Thesis - Instituto de Telecomunicações

3.2. HUMAN COMPUTER INTERACTION 37to have an interface emulator that understands the X-protocol. These emulators work inmost of the operating systems, including Windows.For the requirements of our research, we needed an extended system integrated with thebrowser, which could provide contextual information of the generated user interaction eventsthat could be used without the need to install an external application. This motivated thecreation of the Web Interaction Display and Monitoring system (WIDAM) described insection 3.2.3.1.2 Signal DatabasesSeveral research projects have contributed to the collection of signals in a structured way,making them available to the research community. We mention some projects that servedas inspiration and base for our work.The phsysionet signal database [89] is an on-line database with both physiologic signalsand companion signal processing toolboxes. Since its creation several groups have contributedwith annotated databases of ECG, EEG, Electro-Oculography (EOG), respirationand gait, among others, where these signals can be viewed on-line with web-based plottingtools. The site promotes challenges for solving pattern recognition problems related to theidentification of some pathological conditions.In a project conduced by the MIT affective computing group [99], physiologic and videosignals were acquired, creating a database of signals used with the intention of identifyingstress and some emotional states in the context of driving tasks.In [67] it is described the process of creation and the structure of a multimodal biometricdatabase with fingerprint, face, voice, and iris as sources.3.2 Human Computer InteractionOne of the relevant information sources to our research is the behavior of the user whileinteracting with the computer. To be able to monitor the user interaction with the computer,we developed a system named Web Interaction Display and Monitoring [80] to acquire theuser interaction in a web page. With this approach, the HCI data can be collected overthe Internet. The WIDAM system enables the communication between the page that is