1,721,003 research outputs found
A Laboratory for Prototyping and Testing Multimedia Presentations
No full textIn this article we describe a prototyping environment, which allows an author to set up and test a complex hypermedia presentation. It contains a visual editor, based on a graph notation, in which the nodes are media objects and the edges are the synchronization relations between them; an execution simulator, which helps the author to test the presentation dynamics by manually triggering media related events; and a player, which allows the author to preview the presentation and to visually relate the execution evolution with the interpretation of the synchronization schema
Analyzing the Use of Large Language Models for Content Moderation with ChatGPT Examples
Full text linkContent moderation systems are crucial in Online Social Networks (OSNs). Indeed, their role is to keep platforms and their users safe from malicious activities. However, there is an emerging consensus that such systems are unfair to fragile users and minorities. Furthermore, content moderation systems are difficult to personalize and lack effective communication between users and platforms. In this context, we propose an enhancement of the current framework of content moderation, integrating Large Language Models (LLMs) in the enforcing pipeline
A mobile sensing and visualization platform for environmental data
Full text linkThe ubiquity of mobile technology has opened the door to the new era of mobile sensing. Through this new paradigm, physical phenomena can be observed in a distributed way, crowd-sourcing the data measurement tasks to smartphones and/or other popular smart wearables. Mobile sensing and wireless communications can hence be employed to gather data and generate new information and services, benefiting our society. As a proof-of-concept, we have developed a mobile sensing platform able to pervasively collect environmental data. To improve the quality of collected data we have also created an application for pedestrian navigation that works both on smartphones (also using Augmented Reality) and on smartwatches, thus ensuring an appropriate exposition of the mobile device (and its sensors) when collecting data. Furthermore, our navigation app is able to provide users with personalized pedestrian routes that take into account environmental parameters and not only the route length. Finally, we have also devised a web service able to provide graphical visualization and historical evolution of sensed data
Enriching SMIL with assertions for temporal validation
No full textIn this paper we define a formal semantics for the language SMIL which can be used in a number of applications. First of all, we propose a computer aided authoring system which include a Semantic Validator Module for the evaluation of the temporal consistency of the resulting multimedia presentation. If any temporal conflict is found, the system returns to the user a message pointing out the tag which contains the error and its motivation. This helps the user to correct the error. We also introduce a notion of equivalence for SMIL tags which is useful to find a candidate for substitution in the development of complex multimedia structure, for example in the context adaptation process
A Visual Authoring Environment for Prototyping Multimedia Presentations
No full textIn this paper we describe an authoring environment which allows the author to set up and test a complex multimedia presentation by defining the synchronization relationships among media. The main component of the authoring environment is a visual editor based on a graph notation, in which the nodes are media objects involved in a multimedia presentation, and the edges are the synchronization relations between them. Several external representations can be generated: a timeline-based representation highlighting media sequencing, and an XML-based description suitable for further processing. An execution simulator helps the author to check the presentation behavior before delivery
Modelling Synchronized Hypermedia Presentations
No full textThis paper presents a synchronization model for hypermedia presentations. Several media, continuous, like video and audio files, and non-continuous, like text pages and images, are delivered separately in a distributed environment like the World Wide Web, and presented to the user in a coordinated way.
The model is based on a set of synchronization relationships which define media behavior during presentation playback, channels in which to play them, and the effects of user interaction. The model is suited for a wide range of applications, among which self and distance education, professional training, Web advertising, cultural heritage promotion and news-on-demand are good representatives. The model is formally described in terms of changes in the presentation state due to media-related events. A virtual exhibition is analyzed as a test bed to validate the model
The University Learning Experience: A Dual Approach to Understanding Study Habits and Attendance Patterns
No full textThe pandemic has transformed the traditional perception of university life, revealing alternative learning methods and prompting a shift in students’ attitudes towards education. With emptied classrooms, students now navigate flexible schedules, recorded lectures, and increased autonomy in learning. This departure from traditional learning motivators, such as intellectual curiosity, is attributed to economic and social pressures. Distance learning has become integral, challenging the assumption of mandatory classroom attendance. Students, embracing a blend of online and in-person classes, prioritize value over physical presence. This paradigm shift presents universities with the dilemma of reengaging students while balancing tradition and innovation. To address this, understanding student perspectives is crucial. Through a comprehensive questionnaire involving 344 students across scientific and humanities disciplines, this study explores preferences, challenges, and expectations, aiming to inform future educational models
Wearable sensor networks: A measurement study
Full text linkWearable technology is no longer science fiction. Thanks to the growing capability in the production chain to miniaturize complex electronics, a wide variety of gadgets that can be worn or included in dresses and accessories have emerged. These smart gadgets can collect data about the physical condition of the user and/or the environment providing the basis for innovative and valuable services. The main goal of this paper is to assess this context through field experiments undertaken in a testbed comprised of sensing hardware deployed on open source boards such as Arduino. Moreover, coupled with the sensing tier, we propose a proof-of-concept deployment architecture enabling a wide range of wearable sensors to collect and transmit data to a logically centralized unit
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