SentiTur: Building Linguistic Resources for Aspect-Based Sentiment Analysis in the Tourism Sector

The use of linguistic resources beyond the scope of language studies, i.e. commercial purposes, has become commonplace since the availability of massive amounts of data and the development of tools to process them. An interesting focus on these materials is provided by Sentiment Analysis (SA) tools and methodologies, which attempt to identify the polarity or semantic orientation of a text, i.e., its positive, negative, or neutral value. Two main approaches have been made in this sense, one based on complex machine-learning algorithms and the other relying principally on lexical knowledge (Taboada et al., 2011). Lingmotif is an example of lexicon-based SA tool offering polarity classification and other related metrics, together with an analysis of the target segments evaluated (Moreno-Ortiz, 2017). Sentiment has been shown to be domain-specific to a large extent (Choi & Cardie, 2008) and it is therefore necessary to study and describe how sentiment is expressed not only in general language, but also in specialized domains. The availability of annotated, domain-specific corpora could greatly enhance the capacity of SA tools. Furthermore, the demand for a more fine-grained approach requires the identification of specific domain terminology, allowing the recognition of target terms associated with the polarity (Liu, 2012). Most available SA corpora are annotated at the document level, which allows systems to be trained to return the overall orientation of the text. However, more detail is necessary: what aspects exactly are being praised or criticized? This type SA is known as Aspect-Based Sentiment Analysis (ABSA), and attempts to extract more fined-grained knowledge. ABSA has attracted the attention of recent SemEval shared-tasks (Pontiki et al., 2015)

Linguistic resources and cognitive aspects in alternative communication

International audienceWe present in this paper an alternative communication system (hereafter ACS) for handicapped persons. The problem consists in helping people to communicate in any situation with any kind of disability, including some kind of cognitive problems as well. Alternative communication primarily relies on an alternative access to the computer by means of various electronic devices (especially in the case of fully paralyzed people). But this also means the necessity of taking into account the communication situation together with the user characteristics.The preliminary question when developing an alternative communication system concerns the specification of user need. Communicating does not only consists in producing a message or a text, eventually synthesized with a text-to-speech system. An ACS also needs to propose different kind of communications, including non-verbal ones.Moreover, such systems have to consider some psychological aspects. In particular in the case of degenerative diseases, new device have to be introduced as new step in the degeneration are crossed. We propose an evolutionary system following users needs and capabilities, avoiding them the feeling of using a new device.Technically, our system relies on a set of sophisticated and original linguistic resources (lexicon and grammars) allowing word access, word prediction and text composition. It also takes into account different kind of communications, from icons to texts via phonemes and morphemes (useful for example in a word completion process). Finally, it proposes the possibility of a multimodal control of the system. This system is currently under evaluation by several users in real-world situation

Linguistic resources and cognitive aspects in alternative communication

International audienceWe present in this paper an alternative communication system (hereafter ACS) for handicapped persons. The problem consists in helping people to communicate in any situation with any kind of disability, including some kind of cognitive problems as well. Alternative communication primarily relies on an alternative access to the computer by means of various electronic devices (especially in the case of fully paralyzed people). But this also means the necessity of taking into account the communication situation together with the user characteristics.The preliminary question when developing an alternative communication system concerns the specification of user need. Communicating does not only consists in producing a message or a text, eventually synthesized with a text-to-speech system. An ACS also needs to propose different kind of communications, including non-verbal ones.Moreover, such systems have to consider some psychological aspects. In particular in the case of degenerative diseases, new device have to be introduced as new step in the degeneration are crossed. We propose an evolutionary system following users needs and capabilities, avoiding them the feeling of using a new device.Technically, our system relies on a set of sophisticated and original linguistic resources (lexicon and grammars) allowing word access, word prediction and text composition. It also takes into account different kind of communications, from icons to texts via phonemes and morphemes (useful for example in a word completion process). Finally, it proposes the possibility of a multimodal control of the system. This system is currently under evaluation by several users in real-world situation