Editorial

Pedro Isaías and Marcin Paprzycki 

Medical Image Noise Reduction and Region Contrast Enhancement Using Partial Differential Equations,

Miguel Alemán-Flores, Luis Álvarez-León, Patricia Alemán-Flores, Rafael Fuentes-Pavón and
 José M. Santana-Montesdeoca   

A Java Bread-Board Simulator: Digital Circuit Simulation with an Open-Source Toolset,

Chris Bailey and Michael J Freeman   

Location-Aware Access Control: An Overview,

Michael Decker  

 Automatic Summarization of News Using Wordnet Concept Graphs,

Laura Plaza, Alberto Día and  Pablo Gervás   

Building a Collaboratory in an Engineering R&D Organization,

Zita P. Correia, Catarina Egreja, Maria Joaquina Barrulas, Rui Gil, Diogo R. Ferreira and
 Luís Arriaga da Cunha   

S-CD: Surface Collision Detection Toolkit for Virtual Prototyping,

Mauro Figueiredo   

Distributed Pattern Recognition for AIR Quality Analysis in Sensor Network System,

Yajie Ma, Yike Guo and Moustafa Ghanem  

Continuous-Time Hidden Markov Models for the Copy Number Analysis of Genotyping Arrays,

Matthew Kowgier and  Rafal Kustra