Diogo Martins

• PhD. in Computer Science - Multimedia Systems
• PostDoc Position at University of São Paulo

The recording of multimedia sessions of small group activities, such as meetings, lectures and webconferences, is becoming increasingly popular following the improvements in recording technologies, the popularity of web-based media repositories, and the opportunity of reviewing or sharing the activity in a later moment. When reviewing a (potentiall...

When capturing multimedia records of collaborative activities (e.g. lectures, meetings, etc.), later access to the captured activity is usually provided by a linear video comprising the contents of the exchanged media. Such alternative impairs the review of the activity to the extent that the user only counts on the traditional timeline-based video...

Traditional processes of multimedia production are generally regarded as professionally-oriented workflows, and they don't generally encompass the context of user-generated multimedia content. Taking into consideration production led by users, there is an urge for new frameworks that model end-users not only as consumers of multimedia content, but...

Synchronous communication tools allow remote users to collaborate by exchanging text, audio, images or video messages in synchronous sessions. When generating records from captured meetings, the alternative usually adopted is to generate a linear video with the contents of the exchanged media. Such approach limits the review of the meeting for watc...

When generating records from captured meetings, such as video lectures or distance education activities supported by synchronous communication tools, the alternative usually adopted is to generate a linear video with the contents of the exchanged media. Such approach limits the review of the meeting, reducing it to watching a video using the tradit...

This paper reports the design of the user experience in EducaTV, an architecture for the association of value-added interactive content to educational TV programs. To properly tackle the unique user interface (UI) challenges posed by educational TV applications, EducaTV was designed through User-Centered Design (UCD) principles with extensive evalu...

Synchronous communication tools allow remote users to collaborate by exchanging text, audio, images or video messages in synchronous sessions. In some scenarios, it is paramount that collaborative synchronous sessions be recorded for later review. In particular in the case of web conferencing tools, the approach usually adopted for recording a meet...

In some scenarios, it is paramount that collaborative syn-chronous sessions be recorded for later review. Particularly in the case of webconferencing tools, the approach usually adopted for recording a meeting is to generate a linear video with the content of the exchanged media. Such approach limits the review of the meeting to the user watching a...

This paper describes an approach to provide access to educational content through interactive Digital TV (iDTV) enabled by XML technologies and design patterns. The project is based on Brazilian standards for iDTV anad provides functionalities for presenting learning objects on TV, embedded in scenarios of distance education.

Ubiquitous Learning (UbiLearning) environments heavily em-ploy mobile devices to empower users with mobility and tooling support to learn anytime, anywhere. Introducing mobile devices in educational settings imposes constraints on search behavior due to limited resources on these devices such as small screens and restricted input functionalities. T...

This paper proposes a Ubiquitous Computing Environment for Medical Education, whose kernel is a Web-based system with collaborative tools, to support the interactions and computational tasks among different actors involved in the Medical Education process. In order to allow this environment to be ubiquitous, the Web pages of this system are adapted...

This paper proposes an information retrieval process that employs a relevance feedback approach based on implicit evidences provided by contextual information and explicit evidences provided by the user behavior during interaction. This process takes advantage of semantic information processing enabled by the use of ontologies to build semantic ind...

cid is a computational tool developed in the Web environment to process cloned DNA fragments with the objective of masking the vector and adaptor regions, detecting the presence of microsatellites and designing the most appropriate primer pairs for the amplification of the identified repetitive sequences. This entire process is executed by the user...

Over the last few years, the Web's expansion has been accompanied by a growing number of mobile devices with Internet access capabilities. However, most Web-based content is still developed for presentation on personal computers, disregarding the limited resources of these mobile devices (e.g., processing, memory, power, screen, markup languages)....