Electronic tickets demonstrate, without the use of paper, the possession of an authorization or access to a determined service. In this scenario, some security requirements must be accomplished. Moreover, some determined services should guarantee the anonymity of the users in the system. In addition to these requirements, the transferability of a ticket from one user to another (without involvi...

This Internet-Draft describes NFSv4 minor version one, including features retained from the base protocol and protocol extensions made subsequently. The current draft includes desciption of the major extensions, Sessions, Directory Delegations, and parallel NFS (pNFS). This Internet-Draft is an active work item of the NFSv4 working group. Active and resolved issues may be found in the issue tra...

The majority of models of inflation in string theory predict an absence of measurable gravitational waves, r << 10−3. The most promising proposals for making string theoretic models that yield measurable tensor fluctuations involve axion fields with slightly broken shift symmetry. We consider such models in detail, with a particular focus on the N-flation scenario and on axion valley/natural in...

Privacy protection on user context is one of the most important issues in ubiquitous and pervasive computing. This paper describes a new privacy protection approach that not only filters and reduces the granularity of context information to correct access level granularity, but also intelligently replace the filtered-out context information with the artificial context information considered app...

This paper is an expanded version of a paper presented at the EDEN conference, Vienna, June 2006. It expands the model of learner engagement in the e-portfolio process and defines types of engagement experienced by the user. The factors which impact on the type of engagement enjoyed by the user are numerous and the paper will argue that feedback provision and relevance are the two most importan...

Bench-scale systems are often used to evaluate pretreatment methods and operational conditions that can be applied in full-scale ultrafiltration (UF) systems. However, the membrane packing density is substantially different in bench and full-scale systems. Differences in concentration factor (CF) at the solution-membrane interface as a result of packing density may impact the mass transfer and ...

The present study is an attempt to discover some of the statistically significant outlines motivations and factors that influence the quality in e-ticketing, which affects customers’ perceptions, preferences, and intentions. Consumers, especially business professions – the subjects of this study – are constantly demanding higher quality e-commerce services. All three hypotheses were found to be...

This paper describes two different approaches to use Near Field Communication (NFC) enabled mobile phones in a ticketing system dedicated to event management: (i) a offline version where some equipments are not connected to the Internet ; (ii) a online version where an Internet connection is available on all the equipments composing the infrastructure. These two propositions are compared so as ...

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Humorous images can be seen in many social media websites. However, newcomers to these websites often have trouble fitting in because the community subculture is usually implicit. Among all the types of humorous images, Internet memes are relatively hard for newcomers to understand. In this work, we develop a system that leverages crowdsourcing techniques to generate explanations for memes. We ...