Editorial

Pedro Isaías and Marcin Paprzycki 

Psychological considerations in Social Engineering – The ψ-wall as defense,

 Evangelos D. Frangopoulos, Mariki M. Eloff and Lucas M. Venter    

Sense-Making and Argumentation-Based Knowledge: The Lost On the Moon Experiment,

Teppo Räisänen and Harri Oinas-Kukkonen   

Trust-Based Hotspot Selection,

Xavier Titi, Tewfiq El Maliki and Jean-Marc Seigneur  

 Towards Operational Excellence Driven Implementation of the Application Management Function In The Banking And Insurance Sector,

Wil Janssen, Johan Versendaal and Bas van Gils   

A Data Envelopment Analysis Approach for Evaluating Efficiency of the Extreme Programming System Development Methodology,

G.P. De Jager, H.M. Huisman and H.A. Kruger    

Agents That Learn What Argument to Select In Argumentation-Based Negotiations,

Ariel Monteserin and Analía Amandi    

Effective Multi-Connection Video Streaming Over WiMAX,

Salah Saleh Al-Majeed and Martin Fleury  

A New Density-Based Clustering Approach in Graph Theoretic Context,

Tülin İnkaya, Sinan Kayalıgil and Nur Evin Özdemirel