Synchronisation of replicated shared data is a key issue in collaborative writing systems. Most existing synchronization tools are specific to a particular type of shared data, i.e. text files, calendars, XML files. Therefore, users must use different tools to maintain their different copies up-to-date. In this paper we propose a generic synchronization framework based on the operational transf...

Pairs of dispersed individuals are often forced to solve orientation tasks collaboratively. The present study examines how collaborative orientation tasks are solved when pairs of individuals complete the tasks using one of three computerbased communications (text, audio, and video). Both simple and complex tasks were presented. Pairs in the audio condition outperformed those in the text and vi...

We present Meeting Miner, a multimodal meeting browser for navigating recordings of online text and speech collaborative meetings. Meetings are recorded through a collaborative writing environment specially designed to capture participants activities. This information, usually lost in common recordings of multimodal meetings, offers novel possibilities for indexing, navigation and information r...

Undo is an important feature of editors. However, even after over two decades of active research and development, support of undo for real-time collaborative editing is still very limited. We examine issues concerning undo in collaborative text editing and present an approach using a layered commutative replicated data type (CRDT). Our performance study shows that it provides sufficient respons...

We describe an “expert coach” for students’ collaborative information seeking and knowledge construction. This coach compares an expert’s prespecification of the evidential relations among “snippets” of HTML-based text with the current state of a diagram constructed by students in the course of collaborative scientific inquiry. The expert advises the students by pointing out information that ma...

This study aimed to examine the effect of two types of collaborative output tasks on Iranian EFL learners’ comparative adjectives with two or more syllables. Thirty Iranian EFL learners participated in this study which were then divided into two experimental and one control groups; one experimental group received dictogloss task in 4-pairs and the other experimental group was given text reconst...

Web information is too heterogeneous that users have difficulties to retrieve their needed information: text, image orvideo. In this context, the collaborative work presents one solution proposed to solve this problem. Collaborative retrieval enables the retrieval histories’ sharing between users having the same profile across multiple tools such as annotations. We propose in this paper to impr...

We present a novel algorithm, called dARB, for solving the concurrency control problem in completely distributed collaborative applications. The main advantages of our approach are the simplicity of use and good responsiveness, as there are no lock mechanisms. The algorithm is application independent, which it makes it suitable for general collaborative applications. The only constraint is that...

Many real-world analysis tasks can benefit from the combined efforts of a group of people. Past research has shown that to design visualizations for collaborative visual analytics tasks, we need to support both individual as well as joint analysis activities. We present Cambiera, a tabletop visual analytics tool that supports individual and collaborative information foraging activities in large...