Papers by Cristina Ribeiro
Recursos Informáticos do DEEC na Asprela
... de mensagens, o que se torna especialmente relevante no caso das ligaçoes de baixo débito (e... more ... de mensagens, o que se torna especialmente relevante no caso das ligaçoes de baixo débito (ex: acesso de casa via rede telefónica ... oes formais e informais com docentes do DEEC interessados no tema: Fernando Nunes Ferreira, Pedro Souto, Gabriel David, Manuel Ricardo ...
The resolution of combinatorial problems typically requires the articulation of tools that range ... more The resolution of combinatorial problems typically requires the articulation of tools that range from modeling languages to dedicated solvers, including processing input data sets and visualizing results. This work concerns the improvement of the software development environment for a research project using a custom-designed XML dialect. NestingXML has been designed to capture one kind of combinatorial problems in what concerns their input and output data. The dialect is used for storing problem and solution descriptions in a flexible way. In a project context, data formatted according to the dialect are imported into a Java API used for developing solvers and associated tools. The problem description is enriched with both preprocessing data and solution descriptions. We describe the NestingXML dialect and the Java API used in the project and illustrate their use in the problem-solving process. The resulting environment demonstrates increased flexibility in data representations and will become an easy integration medium for new team members.
Over the years, blogs have become a popular and influent part of the web, having many distinctive... more Over the years, blogs have become a popular and influent part of the web, having many distinctive features -they are usually thematic and organized by communities, their contents have a chronological order and they are interesting both for social studies and for diverse economical activities. In this dissertation, we present a characterization of the portuguese blogosphere based on a large set of portuguese blogs collected from multiple sources across a 5-year period.
Pesquisa Operacional
In nesting problems a two-dimensional piece of material must be divided into smaller pieces with ... more In nesting problems a two-dimensional piece of material must be divided into smaller pieces with irregular shape. The variant of the problem dealt with here considers only one big piece with fixed width and infinite length. Nesting problems have traditionally been tackled either by heuristic algorithms or, for rather small problems, by building mixed integer programming models.
Summarization of changes in dynamic text collections using Latent Dirichlet Allocation model
Information Processing & Management, 2015
ABSTRACT
An assessment of a Wireless Mesh Network performance for Urban Search and Rescue task
2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH), 2009
In this paper we present a reliable system for predicting the body position, or pose, of Urban Se... more In this paper we present a reliable system for predicting the body position, or pose, of Urban Search and Rescue (US&R) dogs. We demonstrate that the Canine Pose Estimation (CPE) system can provide a reliable estimate for some poses and when coupled with effective wireless transmission over a mesh network, pose information can be made available to remote a handler
Wireless estimation of canine pose for search and rescue
2008 IEEE International Conference on System of Systems Engineering, 2008
Page 1. Wireless Estimation of Canine Pose for Search and Rescue 1Cristina Ribeiro, 2Alexander Fe... more Page 1. Wireless Estimation of Canine Pose for Search and Rescue 1Cristina Ribeiro, 2Alexander Ferworn, 1Mieso Denko, 2James Tran, 3Chris Mawson 1Department of Computing and Information Science, University of Guelph ...
Actas do Colóquio Do Documento à Informação
Actas do Colóquio Do Documento à Informação Cristina Ribeiro As Ciências Documentais ea constru... more Actas do Colóquio Do Documento à Informação Cristina Ribeiro As Ciências Documentais ea construção da Web semântica Irene Tomé Da Informação ao Conhecimento: uma estratégia sobre teatro vicentino José António Calixto Literacia da Informação: um desafio para as ...
Spatial TimeDB—Valid Time Support in Spatial DBMS
An importer of virtual 3D City Models datasets into a spatiotemporal database
Management of research data at Porto University: from research needs to curation workflows supported on a data repository
DWXML-A Preservation Format for Data Warehouses
Biodiversity Information Systems using Georeferencing and Physical Identification
Comparing application profiles and ontologies for describing experiment data
Preservation of Data Warehouses: Extending the SIARD System with DWXML Language and Tools
Summarization of Changes in Text Collections
SIARD Archive Browser–The Components
The impact of time in link-based Web ranking
Identification and Classification of Health Queries: Co-Occurrences vs. Domain-Specific Terminologies
Current multimedia applications require efficient tools for modeling and search. While solid mode... more Current multimedia applications require efficient tools for modeling and search. While solid models must support a large variety of concepts like sets, sub-sets, part-of hierarchies and integrate standards like Dublin Core, MPEG-7 (descriptors, descriptor schemes), TV-Anytime, MPEG-21 (digital item, digital item adaptation, digital item identification), the search algorithms must deal with heterogeneous multimedia data (text, image, audio and video). The search in audiovisual data requires the use of heterogeneous metadata representing a wide range of features, from low-level ones (color, motion) to high level ones (subject, mood), or domain-dependent concepts.
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Papers by Cristina Ribeiro