Encontrados 8 documentos, a visualizar página 1 de 1
It Is the time for Portuguese texts!
Craveiro, Olga; Macedo, Joaquim; Madeira, HenriqueIn this work, we introduce a software testbed for temporal processing of Portuguese texts, composed by several building blocks: identification, classification and resolution of temporal expressions and temporal text segmentation. Starting from a simple document, we can reach a set of temporally annotated segments, which enables the establishment of relationships between words and time. This tem- porally enriche...
Towards a segment-based temporal information retrieval model
Craveiro, Olga; Macedo, Joaquim; Madeira, HenriqueThe extraction of temporal information from text documents is becoming increasingly important in many applications such as natural language processing, information retrieval, question answering, etc.. Indeed, the temporal dimension plays a key role on most of these systems, promoting better performance. Our goal is the definition of a temporal document representation, incorporating the time dimension into infor...
Ambient assisted living system: local monitoring console
Madeira, HenriqueCom o aumento da esperança média de vida, da percentagem de idosos e uma consequente urgência de melhoria de eficiência na prestação de cuidados de saúde, o conceito de Ambient Assisted Living tem vindo a ganhar importância na sociedade actual. Este conceito pode ser definido como vida em ambiente de apoio. Idealmente, um sistema de AAL deve ser implementado como uma série de conceitos modulares, inter-operacio...
Use of Co-occurrences for temporal expressions annotation
Craveiro, Olga; Macedo, Joaquim; Madeira, HenriqueThe annotation or extraction of temporal information from text documents is becoming increasingly important in many natural language processing applications such as text summarization, information retrieval, question answering, etc.. This paper presents an original method for easy recognition of temporal expressions in text documents. The method creates semantically classified temporal patterns, using word co-o...
Robust assertions and fail-bounded behavior
Prata, Paula; Rela, Mario; Madeira, Henrique; Silva, João GabrielIn this paper the behavior of assertion-based error detection mechanisms is characterized under faults injected according to a quite general fault model. Assertions based on the knowledge of the application can be very effective at detecting corruption of critical data caused by hardware faults. The main drawbacks of that approach are identified as being the lack of protection of data outside the section covere...
Robust assertions and fail-bounded behavior
Prata,Paula; Rela,Mario; Madeira,Henrique; Silva,João GabrielIn this paper the behavior of assertion-based error detection mechanisms is characterized under faults injected according to a quite general fault model. Assertions based on the knowledge of the application can be very effective at detecting corruption of critical data caused by hardware faults. The main drawbacks of that approach are identified as being the lack of protection of data outside the section covere...
Joint evaluation of recovery and performance of a COTS DBMS in the presence of ...
Vieira, Marco; Madeira, HenriqueA major cause of failures in large database management systems (DBMS) is operator/administrator faults. Although most of the complex DBMS available today have comprehensive recovery mechanisms, the effectiveness of these mechanisms is difficult to characterize. On the other hand, the tuning of a large database is very complex and database administrators tend to concentrate on performance tuning and disregard th...
Approximate Query Answering Using Data Warehouse Striping
Bernardino, Jorge R.; Furtado, Pedro S.; Madeira, Henrique C.This paper presents and evaluates a simple but very effective method to implement large data warehouses on an arbitrary number of computers, achieving very high query execution performance and scalability. The data is distributed and processed in a potentially large number of autonomous computers using our technique called data warehouse striping (DWS). The major problem of DWS technique is that it would requir...
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