BACKGROUND There is an urgent need to understand the safety of e-cigarettes with adolescents. We sought to identify the presence of chemical toxicants associated with e-cigarette use among adolescents. METHODS Adolescent e-cigarette users (≥1 use within the past 30 days, ≥10 lifetime e-cigarette use episodes) were divided into e-cigarette-only users (no cigarettes in the past 30 days, urine 4...

The eLogbook is a collaborative Web-based environment deployed by Swiss Federal Institute of Technology in Lausanne (EPFL). It consists of an activity-oriented space where a community of educators, teaching assistants and students can form groups, conduct activities and perform several actions over stored and shared assets. Moreover, the eLogbook offers awareness services in order to sustain co...

The development of e-Health services in rural environments, where broadband networks are usually not accessible, requires a specific analysis of available resources to improve Quality of Service (QoS) management. This work quantifies the maximum number of simultaneous users that fulfill the specific QoS levels in common e-Health services, including both store-andforward and real-time telemedici...

In a democratic country, voting is one of the most important activity. In many democracies over the years, there has been decrease in the number of voters coming for election because of the inconvenient voting system. An electronic voting scheme allows voters to vote securely from distance through internet by interacting with a set of authorities. However there is always a chance that an advers...

The second World Wide Web generation is increasingly oriented to services. This generation is rich in requests for dynamic and personalised content, which represents an important segment of current internet traffic. E-business applications are a particular case of the dynamic web, where dynamism and personalisation play an important role in business strategy. Understanding the characteristics o...

In this study, we present users assistants for e-learning environment over the Web called AVUNET. It was made up of an educational server that allows access to the available courses on the site. The server was structured in pedagogical labs that respond to the user needs. It offers also a module for self-evaluation so that the user can evaluate his/her level. Trainers have created this facility...