This study investigated the effectiveness of individual and collaborative outputbasedfocus-on-form instructional tasks on the acquisition of English inversionstructures by EFL learners. Moreover, it explored the developmental trend oflearners’ inversion acquisition. To this end, 60 homogeneous EFL learners wereassigned to individual and collaborative output groups. They were exposed to textsenc...

Abstract The present study attempted to investigate the impact of cooperation versus collaboration on college students` reading ability. To fulfill the purpose of the study, 90 participants were chosen from among 140 by means of administering the Nelson Proficiency Test. They were divided into three groups: cooperative group, collaborative group, and control group. A fifty-item multiple-choice ...

Collaborative Filtering is effective to provide customers with personalized recommendations by analyzing the purchase pattens. Matrix factorization, e.g. Singular Value Decomposition, is another successful technique in recommendation system. We implemented Singular Value Decomposition algorithm to achieve the least total squared errors. Based on the result, item-feature Collaborative Filtering ...

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...

Collaborative tagging describes the process by which many users add metadata in the form of keywords to shared content. Recently, collaborative tagging has grown in popularity on the web, on sites that allow users to tag bookmarks, photographs and other content. In this paper we analyze the structure of collaborative tagging systems as well as their dynamic aspects. Specifically, we discovered ...

During the determination of macromolecular structures, scientists routinely use complex graphics software to display various representations of the molecule of interest. Once the structure determination is complete, coordinates are deposited in the Protein Data Bank (PDB), from where anyone with an Internet connection may download and view them or request them on CD-ROM. However, the currently ...

How do collaborative networks influence an individual’s creativity? Some have argued that structural brokerage – having direct ties to collaborators who do not have direct ties with one another leads to greater creativity. Others have argued for the benefits of cohesive and redundant ties between an individual’s collaborators. To resolve the controversy, we argue that brokerage confers continge...

Modern online courses can be characterized as dynamic openended learning environments (DOELEs). For instructional planning to work in DOELEs, an approach is needed that does not rely on data structures such as prerequisite graphs that would need to be continually rewired as the LOs change. A promising approach is collaborative filtering based on learning sequences (CFLS) using the ecological ap...

In this chapter we discuss the advantages of a structured model of documents in a cooperative editor. The discussion is based on the experience gained in developing and using Alliance, a groupware application that allows several users distributed on a network to cooperate for producing documents in a structured way. In addition to the local editing functions made available on each site by a str...