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Web users' clustering is an important mining task since it contributes in identifying usage patterns, a beneficial task for a wide range of applications that rely on the web. The purpose of this paper is to examine the usage of Kullback‐Leibler (KL) divergence, an information theoretic distance, as an alternative option for measuring distances in web users clustering.

KL‐divergence is compared with other well‐known distance measures and clustering results are evaluated using a criterion function, validity indices, and graphical representations. Furthermore, the impact of noise (i.e. occasional or mistaken page visits) is evaluated, since it is imperative to assess whether a clustering process exhibits tolerance in noisy environments such as the web.

The proposed KL clustering approach is of similar performance when compared with other distance measures under both synthetic and real data workloads. Moreover, imposing extra noise on real data, the approach shows minimum deterioration among most of the other conventional distance measures.

The experimental results show that a probabilistic measure such as KL‐divergence has proven to be quite efficient in noisy environments and thus constitute a good alternative, the web users clustering problem.

This work is inspired by the usage of divergence in clustering of biological data and it is introduced by the authors in the area of web clustering. According to the experimental results presented in this paper, KL‐divergence can be considered as a good alternative for measuring distances in noisy environments such as the web.

The purpose of this study is to attempt a brief presentation of book exchange practices, as these are unfolding around the world. Then, the authors focus on free exchange libraries and analyse different aspects of the phenomenon. Finally, the authors are presenting the first hesitant steps of the phenomenon in Greece, linking it with the crisis that has lately been plaguing the Greek society.

The widespread and constantly surging movement of exchange libraries has attracted thousands of fans around the world; also, it is multifaceted and constantly transforming. In this paper, the authors are attempting to charter the phenomenon generally and specifically in Greece through relevant sources and on-the-spot observation.

The authors believe that free exchange libraries will continue to multiply both globally and in Greece, and that, through this movement, the audience gives an answer to the economic crisis and the crisis of values, making yet another step in the course towards satisfying the demand for a better world.

This paper is one of the few attempts to reflect-charter the phenomenon and probably one of the first to be accomplished under a sociological spectrum.

Selecting the most effective leveraging methods is crucial for national Olympic sponsors, who have limited time to achieve their sponsorship objectives. This paper presents the Optimal Leveraging Activity (OLA) model, which suggests that leveraging activities for high involvement products/services should primarily focus on enhancing brand image, knowledge and involvement, while for low involvement products/services a more sales-oriented approach is favourable. The leveraging activities of four Grand National Sponsors of the Athens Olympic Games illustrate the differences.

Investigates the differences in protocols between arbitral tribunals and courts, with particular emphasis on US, Greek and English law. Gives examples of each country and its way of using the law in specific circumstances, and shows the variations therein. Sums up that arbitration is much the better way to gok as it avoids delays and expenses, plus the vexation/frustration of normal litigation. Concludes that the US and Greek constitutions and common law tradition in England appear to allow involved parties to choose their own judge, who can thus be an arbitrator. Discusses e‐commerce and speculates on this for the future.

Building on existing sport licensing research from the North American market, the primary goal of this study was to explore meanings embedded in sport licensed products in the Greek sport market. The secondary goal was to examine the extent to which product meanings can predict favorable sport consumer behaviors.

Data were collected from football and basketball fans of the two biggest professional sport clubs in Greece. A total of 255 Greek fans completed the surveys. Data were analyzed using exploratory and confirmatory factor analysis and structural equation modeling.

The findings uncovered a 14-item solution to capture the meanings attached to sport licensed products in the Greek market, including four factors-sources: experience, socialization, aesthetics and locality. Meanings related to aesthetics and experience significantly and positively predicted customer satisfaction, word-of-mouth communication, purchase intention and willingness to pay a price premium for licensed products of one's favorite team.

From a practical standpoint, this study shows that sport licensed products need to be positioned in the market based on their aesthetic quality. Also, communication plans that associate these products with opportunities for unique experiences, relationships with other fans and a connection to one's local community can drive sales, especially in less developed sport markets such as Greece.

This research contributes to existing literature by highlighting the prominent role of the aesthetic appeal of team licensed products as well as the experience of sport consumers as sources of meaning and value for the owners of those products.

EU membership has been for the greater part of the post-authoritarian period (1974–2010) an important element of the Greek national consensus. Europe was commonly associated in public discourse with geopolitical security, democratic institutions and economic prosperity. Moreover, accession to the European Monetary Union in 2001 was celebrated as proof of a successful national course and as promise for economic growth. Nevertheless, challenges to pro-Europeanism both from the left and from the extreme right have risen in the context of the economic crisis (2010–2015). While Euro-sceptical attitudes are still a minority within Greek society – but significantly increased in relation to past trends – the discursive negotiation of Europe in the Greek public debate is characterized by ambiguity and has acquired various negative connotations (e.g. austerity policies, authoritarianism, German hegemony, democratic deficit in decision-making). In the highly-polarized Greek political debate, a new cleavage has emerged based on the acceptance or rejection of the loan agreements and the austerity policies associated with them (the so-called pro- vs. anti-memorandum cleavage) which have also transformed traditional Left vs. Right cleavage thus allowing for political alliances between left-ward and right-ward parties. It remains to be seen whether the new cleavage will take the form of a clash between pro-Europeanists vs. Euroscepticists as it is often argued in the context of Grexit scenarios. While this new dichotomy can be misleading especially if it is unambiguously interpreted in cultural terms, it describes a newly formed social and political tension that is under process. A special chapter in this respect is the currency debate; the dilemma between the euro and the drachma represents distinct ideological paradigms and power structures. The present chapter explores the discursive negotiation of Europe in the context of the Greek public debate analysing discourses produced both by political elites and mass media with special focus on the 2015 referendum campaign and the implications of the July 2015 Greece-EU agreement.