Learn More
When users interact with the Web today, they leave sequential digital trails on a massive scale. Examples of such human trails include Web navigation, sequences of online restaurant reviews, or online music play lists. Understanding the factors that drive the production of these trails can be useful for e.g., improving underlying network structures,(More)
In September 2005, more than 2 years ago O’Reilly published the original definition of the idea of Web 2.0. In the wake of this hype the similar changes in E-Learning have been summarized in the term “E-Learning 2.0”. This paper aims to give a consolidated review on the development in these two years; which technologies and trends proved to be enduring and(More)
Algorithms for constructing hierarchical structures from user-generated metadata have caught the interest of the academic community in recent years. In social tagging systems, the output of these algorithms is usually referred to as folksonomies (from folk-generated taxonomies). Evaluation of folksonomies and folksonomy induction algorithms is a challenging(More)
One of the most frequently used models for understanding human navigation on the Web is the Markov chain model, where Web pages are represented as states and hyperlinks as probabilities of navigating from one page to another. Predominantly, human navigation on the Web has been thought to satisfy the memoryless Markov property stating that the next page a(More)
Models of human navigation play an important role for understanding and facilitating user behavior in hypertext systems. In this paper, we conduct a series of principled experiments with <i>decentralized search</i> - an established model of human navigation in social networks - and study its applicability to information networks. We apply several variations(More)
The paper offers a general view of Web-based Training (WBT) as a number of knowledge transfer processes utilizing current and advanced Internet technology to facilitate and speed the flow of knowledge from people possessing that knowledge to people who need to acquire it. The key here is in the use of both conventional and innovative tools compatible with(More)
Decentralized search in networks is an activity that is often performed in online tasks. It refers to situations where a user has no global knowledge of a network's topology, but only local knowledge. On Wikipedia for instance, humans typically have local knowledge of the links emanating from a given Wikipedia article, but no global knowledge of the entire(More)
It is a widely held belief among designers of social tagging systems that tag clouds represent a useful tool for navigation. This is evident in, for example, the increasing number of tagging systems offering tag clouds for navigational purposes, which hints towards an implicit assumption that tag clouds support efficient navigation. In this paper, we(More)
In this paper we analyze the term “WBT” from different perspectives and claim that the authoring, communicational and data access tools currently available on the Internet are not sufficient to fully exploit the tremendous educational power of the largest information and communication resource mankind has ever had. We contend that primitive hypermedia(More)