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Publications

Publications by LIAAD

2015

Exploring actor-object relationships for query-focused multi-document summarization

Authors
Valizadeh, M; Brazdil, P;

Publication
SOFT COMPUTING

Abstract
Most research on multi-document summarization explores methods that generate summaries based on queries regardless of the users' preferences. We note that, different users can generate somewhat different summaries on the basis of the same source data and query. This paper presents our study on how to exploit the information regards how users summarized their texts. Models of different users can be used either separately, or in an ensemble-like fashion. Machine learning methods are explored in the construction of the individual models. However, we explore yet another hypothesis. We believe that the sentences selected into the summary should be coherent and supplement each other in their meaning. One method to model this relationship between sentences is by detecting actor-object relationship (AOR). The sentences that satisfy this relationship have their importance value enhanced. This paper combines ensemble summarizing system and AOR to generate summaries. We have evaluated this method on DUC 2006 and DUC 2007 using ROUGE measure. Experimental results show the supervised method that exploits the ensemble summarizing system combined with AOR outperforms previous models when considering performance in query-based multi-document summarization tasks.

2015

Proceedings of the 2015 International Workshop on Meta-Learning and Algorithm Selection co-located with European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases 2015 (ECMLPKDD 2015), Porto, Portugal, September 7th, 2015

Authors
Vanschoren, J; Brazdil, P; Carrier, CGG; Kotthoff, L;

Publication
MetaSel@PKDD/ECML

Abstract

2015

Tourism brochures: Linking message strategies, tactics and brand destination attributes

Authors
Brito, PQ; Pratas, J;

Publication
TOURISM MANAGEMENT

Abstract
Brochures are a versatile and ubiquitous tourism advertising medium. Although almost all types of advertisement message strategies are considered in brochure development and production, the relationship of those strategies with brand destination attributes has not been studied. Likewise an extensive inventory of executional tactics can be applied to put forward a brochure concept. This research shows the relationship among executional tactics, message strategies and destination attributes in 400 tourism brochures from around the world. On average, each message strategy is associated with seventeen executional tactics. A single brand destination attribute may work with many message strategies. However, the connection between destination attributes and executional tactics is rather loose. This media-centered approach study will provide a benchmarking profile to advertising agency and tourism destination managers in their endeavor to develop brochures.

2015

Comparison of consumer purchase intention between interactive and Augmented Reality shopping platforms through statistical analyses

Authors
Stoyanova, J; Brito, PQ; Georgieva, P; Milanova, M;

Publication
2015 INTERNATIONAL SYMPOSIUM ON INNOVATIONS IN INTELLIGENT SYSTEMS AND APPLICATIONS (INISTA) PROCEEDINGS

Abstract
The objective of this study is to explore the effectiveness of three digital shopping platforms (Plain Interactive, Marker-based Augmented Reality and Markerless Augmented Reality), on the impressions and purchase intentions of consumers. The study is mainly interested in analysing whether intelligent shopping platforms with AR elements provide any added advantage to an advertised product in the form of favourable attitude or a stronger purchase impulse. During the tests with the three shopping platforms, quantitative data was collected via computerised questionnaire. High and Low class users were statistically extracted, corresponding to the high or low probability to buy or recommend the advertised brand. The results show that Markerless AR system clearly outperforms the Marker-based AR and the Plain Interactive in terms of positive attitude from the users. The second better performing system is the Marker-based AR, which closely follows the Markerless AR, while the Plain Interactive system obtains least approval.

2015

Direct or indirect channel structures. Evaluating the impact of channel governance structure on export performance

Authors
Rambocas, M; Meneses, R; Monteiro, C; Brito, PQ;

Publication
INTERNATIONAL BUSINESS REVIEW

Abstract
The purpose of the study is to examine the impact of channel governance structure on export performance ex post. The study surveyed 105 foreign buyers of crane services from five countries and used MANOVA to test the effects of channel governance structure on export short term and long term performance outcomes. The study found that short term profitability was higher for indirect distribution channel arrangements while longer term outcomes of buyer economic satisfaction and loyalty were higher for direct. The results suggest that exporters are more likely to achieve immediate financial objectives with the support from indirect channels; however, long term objectives are more effectively achieved through direct channels.

2015

Retail Promotion Practices in New Zealand, Australia and Portugal - A Comparison

Authors
Fam K.S.; Merrilees B.; Brito P.Q.;

Publication
Developments in Marketing Science: Proceedings of the Academy of Marketing Science

Abstract
This paper investigates the detailed promotional attitudes of retailers across three countries. The key aim was to see whether the perceptions of owner-managers of nine commonly used promotion tools varied across country. Both perception and budget data was examined, as well as selected combinations of promotion tools.

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