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LaBDA
Research lines

Grupo Labda

List of research lines

Accessibility in Education

During the last years Information and Communication Technology (ICT) has increasingly become indispensable in everyday life of people. Dealing with the educational sector, the use of e-Learning systems has exponentially increased, mainly thanks to Internet. Sometimes Learning Content Management Systems (LCMS) or Virtual Learning ...  [+]

During the last years Information and Communication Technology (ICT) has increasingly become indispensable in everyday life of people. Dealing with the educational sector, the use of e-Learning systems has exponentially increased, mainly thanks to Internet. Sometimes Learning Content Management Systems (LCMS) or Virtual Learning Environments (VLE) as Moodle, aTutor or dotLRN among others are used for authoring and reusing or re-purposing contents as well as virtual spaces for student interaction (such as discussion forums, live chat rooms and live web-conferences). However, we have detected that nowadays most of the LCMS and the e-Learning systems present accessibility barriers and they are not accessible for all the students. On the other hand, real-time captioning and text-to-speech services are used into the classroom for avoiding communication barriers among students and the teacher in the class. [-]

Application of Information Extraction and Retrieval to biomedical domain

During the last years, biomedicine has witnessed a huge development. Large amounts of experimental and computational biomedical data have been generated along with new discoveries, which are accompanied by an exponential increase in the number of biomedical publications describing these discoveries. Nowadays, biomedical professionals ...  [+]

During the last years, biomedicine has witnessed a huge development. Large amounts of experimental and computational biomedical data have been generated along with new discoveries, which are accompanied by an exponential increase in the number of biomedical publications describing these discoveries. Nowadays, biomedical professionals are not able to keep themselves up to date with, for example, all the publications related with adverse drug reactions. The continuing growth and diversification of the scientific literature require tremendous systematic and automated efforts to utilize the underlying information In the near future, tools for knowledge discovery will play a pivotal role in biomedical systems since the overwhelming amount of biomedical knowledge in texts demands automated methods to collect, maintain and interpret them. Particularly, we are working on applying information recovery and information extracting techniques in biomedical texts, especially in detecting biomedical entities (as drugs, genes, proteins) and biomedical associations among entities (drug-drug interactions, etc.) [-]

Methodological frameworks for developing accessible web applications

The Web is the main tool for being able to act as citizens in the Information Society in which we are immersed. Through it you access to multiple services, yet many of these services are not accessible to everyone. The accessibility barriers affect in a higher degree to people with disabilities, but there are many other user groups ...  [+]

The Web is the main tool for being able to act as citizens in the Information Society in which we are immersed. Through it you access to multiple services, yet many of these services are not accessible to everyone. The accessibility barriers affect in a higher degree to people with disabilities, but there are many other user groups at risk of exclusion. The equitable use of the Web is a right for all people. Although in many countries this right is regulated by law, the data indicate that there are many web sites and applications that are not accessible. There are important initiatives, at different levels, with the goal of designing a universal and accessible Web, but there are many obstacles in the path to obtain this goal. As a proposed solution to this situation, from the engineering perspective, the methodological support AWA (Accessibility for Web Applications) has been proposed. AWA provides a workspace in order to include the accessibility requirement in the organizations devoted to web application development. [-]

Spatio-Temporal databases modelling methodologies, techniques, and spatial data management algorithms

An important part of our research deals with practical application of object-relational models and DBs to concrete domains and specialized Information Systems. Spatio-temporal databases are used to represent and manage data for applications like enviromental or weather monitoring and city or airport traffic control and monitoring. ...  [+]

An important part of our research deals with practical application of object-relational models and DBs to concrete domains and specialized Information Systems. Spatio-temporal databases are used to represent and manage data for applications like enviromental or weather monitoring and city or airport traffic control and monitoring. In this systems is important to record and process temporal variation of an item representented in geometrical dimensions. Today, Geographic Information Systems (GIS), handle spatial and not spatial information in heterogeneous ways. The former are tipically stored in ad-hoc filesystems and the latter are stored in relational databases which entails problems to preserve data integrity. We investigate the use of object-relational databases and models to alleviate this problems [-]

Conceptual modelling, integrity constrains and business rules

It is generally accepted in the information system (IS) field that IS quality is highly dependent on the decisions made early in the development life cycle. For this reason, the first phase in the database systems development methodology is crucial and it can affect to the information management, the adaptability to changes and ...  [+]

It is generally accepted in the information system (IS) field that IS quality is highly dependent on the decisions made early in the development life cycle. For this reason, the first phase in the database systems development methodology is crucial and it can affect to the information management, the adaptability to changes and the information systems integration. Our research is based on the study and extension proposal of conceptual models with the aim to integrate, validate, and refine conceptual schemes for several models. In these models an important component to represent the domain semantics are the integrity constraints which constitute a tool to design all requirements specified. The database integrity means to guarantee two important components: correctness and completeness. This is data are valid and relevant in the application domain. Data models are not completed enough to achieve the database integrity because they don’t have mechanism to represent all semantics associated to a given domain. The lack to database integrity could deduce false facts. To covert the aforementioned gap, our research is focused on the definition of methods, techniques, and technologies which can facilitate rules development process in an easy way. [-]

Question Answering systems

In contrast with traditinal Search Engines that returns documents, Question Answering (QA) systems return precise and high quality information nuggets to information needs posed as questions. QA systems are achieving a reasonable degree of performance for factual questions (Who?, Where?, What? ...) whose answer can be retrieved ...  [+]

In contrast with traditinal Search Engines that returns documents, Question Answering (QA) systems return precise and high quality information nuggets to information needs posed as questions. QA systems are achieving a reasonable degree of performance for factual questions (Who?, Where?, What? ...) whose answer can be retrieved from a open domain information repository. Questions with temporal restrictions, definitions, opinions or explanations are among the new challenges for QA technology. Other issues that information access systems should address as multimodality, multilinguality, user or task adaptation are also a matter of current research. Our group works in a QA platform for Spanish, that integrat different resources available. Nevertheless, our interest also lies in tools and techniques that allow the rapid development of QA systems for other languages, even if linguistic resources are limited. For that reason we are mainly interested in Machine Learning techniques, for instance, for named entity recognition. In this context, we have participated since 2004 in CLEF evaluation forum. [-]

Natural Interaction: knowledge models, platforms, and development tools

The Natural Interaction research area aims to imitate human interactive behavior. Users can interact with the machine as do with other people avoiding the need for technological training, the emotional rejection of interacting with a machine, and the 'inconvenience' of classic mechanisms. Researches in various disciplines converge ...  [+]

The Natural Interaction research area aims to imitate human interactive behavior. Users can interact with the machine as do with other people avoiding the need for technological training, the emotional rejection of interacting with a machine, and the 'inconvenience' of classic mechanisms. Researches in various disciplines converge in this area: linguistics, psychology, sociology, voice technologies, computer vision, and knowledge engineering. Our work is focused in this last branch, through several research lines:

- Cognitive Architectures.
- Dialogue Models (joint action).
- Situation Models (supported by spatio-temporal DB).
[Cognos.S demonstrative video] - Presentation Models (overlapping interventions and interruption processing)
- Interface components (Natural Language Processing).
- Ontology (with similarities computation).
- User Models (groups, with predictive capacity).
- Emotional Models.
- Theoretical foundations of Natural Interaction (studies in pragmatics).
- Interaction Platforms (multiagent technology).
- Development Tools (corpus analysis and annotation in various aspects of knowledge): COGNOS Toolkit
[-]

Natural Language Technologies: Named entities recognition and temporal expression recognition and analysis

Internet and Web 2.0 technologies have led to an increase of information available in different forms. The Information Retrieval techniques are one of the ways to organize and improve access to this information. In recent years there have appeared some commercial software services that allow the extraction of keywords and named ...  [+]

Internet and Web 2.0 technologies have led to an increase of information available in different forms. The Information Retrieval techniques are one of the ways to organize and improve access to this information. In recent years there have appeared some commercial software services that allow the extraction of keywords and named entities (NE). These services have been integrated into many applications and can be expected that with the advance of software as a service, they are relevant to improving interoperability and semantic capabilities in the near future. The recognition and classification of named entities (NERC) is a branch of the field of Information Retrieval, whose aim is to identify units of information in the text and classify them into predefined categories, such as people, organizations, places , etc. The LABDA group researches in different domain-adaptive algorithms and languages for entity recognition techniques using bootstrapping techniques when there are no specific resources such as dictionaries, analyzers, etc. Moreover, at present, many applications for Natural Language Processing (NLP) could have a substantial improvement in performance if they referred to the treatment of temporal dimension that has the information they handle. An example of this statement is given in the field of Information Retrieval (IR): the main commercial Web search engines do not perform an explicit analysis of the temporal information of the content, or achieve it in a superficial way, missing the underlying semantics and its potential for implementing advanced techniques in information ordering, selection and filter results, etc.. The temporal information allows locating the events of a text on a timeline obtaining a chronological order. A person may implicitly remove all temporary expressions of a text and the relationship they establish between events, interpreting the time point referred to that expression. However, when it comes to interpreting large amounts of information we face a task too costly to do it manually. If it is to automate this process, is needed provide for additional knowledge to systems that carried out the reasoning. We therefore work in the definition, development and evaluation of a proposal for automated processing of temporal information that is typically handled by applications to access to unstructured information. It also seeks to research for mechanisms of representation of the temporal semantics of the documents dealing with such applications in order to improve the recovery of relevant information. For their achievement it becomes necessary an analysis on the formulating level of the information needs of users, as well as in the information retrieval that they provide as response. This proposal will have additional temporal management skills regarding to traditional systems, and providing a new perspective of temporal management thus solving some of the existing problems. [-]

Universidad Carlos III de Madrid