Unknown words such as proper nouns, abbreviations, and acronyms are a major obstacle in text processing. Abbreviations, in particular, are difficult to read/process because they are often domain-specific. In this paper, we propose a method for automatic expansion of abbreviations by using context and character information. In previous studies dictionaries were used to search for abbreviation ex...

Many student interactions in the collaborative learning process can be captured and stored in a database for future analysis. However, the precious information extraction in database is almost impossible without the use of mining techniques. In this paper we present a model of collaborative learning, individual and group, using data and text mining techniques. Our model allows us to extract rel...

Recently, stability-based techniques have emerged as a very promising solution to the problem of cluster validation. An inherent drawback of these approaches is the computational cost of generating and assessing multiple clusterings of the data. In this paper we present an efficient prediction-based validation approach suitable for application to large, high-dimensional datasets such as text co...

Reading comprehension is one of the most important skills, especially in the EFL context. One way to improve reading comprehension is through strategy use. The present study aimed at investigating the effect of question-generation strategy on learners' reading comprehension. The participants in the study were 63 intermediate students from three intact groups in Resa institute in Boukan, They we...

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...

The members of a work group need to apply a common strategy to collaboratively solve a problem. A good strategy will mainly depend on the collaboration scenario, participants’ background, and available tools. This paper presents two widgets that have been useful to help to define and use good group members’ strategies in collaborative learning scenarios. The concepts behind these widgets can be...

In recent years we have seen a tremendous growth in the number of text document collections available on the Internet. Automatic text categorization, the process of assigning unseen documents to user-defined categories, is an important task that can help in the organization and querying of such collections. In this article we consider the problem of classifying online papers from a specific jou...