Rodrygo L. T. Santos, Ben He, Craig Macdonald, Iadh Ounis,
Opinion finding is a challenging retrieval task, where it has been shown that it is especially difficult to improve over a strongly performing topic-relevance baseline. In this paper, we propose a novel approach for opinion finding, which takes into account the proximity of query terms to subjective sentences in a document. We adapt two state-of-the-art opinion detection techniques to identify subjective sentences from the retrieved documents. Our first technique uses the OpinionFinder toolkit to ...
Tópico(s): Expert finding and Q&A systems
2009 - Springer Science+Business Media | Lecture notes in computer science
Craig Macdonald, Rodrygo L. T. Santos, Iadh Ounis, Ian Soboroff,
The TREC Blog track aims to explore information seeking behaviour in the blogosphere, by building reusable test collections for blog-related search tasks. Since, its advent in TREC 2006, the Blog track has led to much research in this growing field, and encapsulated cross-pollination from natural language processing research. This paper recaps on the tasks addressed at the TREC Blog track thus far, covering the period 2006 - 2009. In particular, we describe the used corpora, the tasks addressed within ...
Tópico(s): Topic Modeling
2010 - Association for Computing Machinery | ACM SIGIR Forum
Rodrygo L. T. Santos, Jie Peng, Craig Macdonald, Iadh Ounis,
Queries submitted to a retrieval system are often ambiguous. In such a situation, a sensible strategy is to diversify the ranking of results to be retrieved, in the hope that users will find at least one of these results to be relevant to their information need. In this paper, we introduce xQuAD, a novel framework for search result diversification that builds such a diversified ranking by explicitly accounting for the relationship between documents retrieved for the original query and the possible ...
Tópico(s): Data Management and Algorithms
2010 - Springer Science+Business Media | Lecture notes in computer science
Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Tópico(s): Advanced Image and Video Retrieval Techniques
2011 - Springer Science+Business Media | Lecture notes in computer science
Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Re-ranking the search results in order to promote novel ones has traditionally been regarded as an intuitive diversification strategy. In this paper, we challenge this common intuition and thoroughly investigate the actual role of novelty for search result diversification, based upon the framework provided by the diversity task of the TREC 2009 and 2010 Web tracks. Our results show that existing diversification approaches based solely on novelty cannot consistently improve over a standard, non-diversified ...
Tópico(s): Mobile Crowdsensing and Crowdsourcing
2011 - Springer Science+Business Media | Information Retrieval
Craig Macdonald, Rodrygo L. T. Santos, Iadh Ounis,
Tópico(s): Web Data Mining and Analysis
2012 - Springer Science+Business Media | Information Retrieval
Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Tópico(s): Advanced Image and Video Retrieval Techniques
2012 - Springer Science+Business Media | Information Retrieval
Produção Nacional
Revisado por pares
Wladmir Cardoso Brandão, Rodrygo L. T. Santos, Nívio Ziviani, Edleno Silva de Moura, Altigran S. da Silva,
A substantial fraction of web search queries contain references to entities, such as persons, organizations, and locations. Recently, methods that exploit named entities have been shown to be more effective for query expansion than traditional pseudorelevance feedback methods. In this article, we introduce a supervised learning approach that exploits named entities for query expansion using Wikipedia as a repository of high‐quality feedback documents. In contrast with existing entity‐oriented pseudorelevance ...
Tópico(s): Web Data Mining and Analysis
2014 - Wiley | Journal of the Association for Information Science and Technology
Craig Macdonald, Rodrygo L. T. Santos, Iadh Ounis, Ben He,
Several questions remain unanswered by the existing literature concerning the deployment of query-dependent features within learning to rank. In this work, we investigate three research questions in order to empirically ascertain best practices for learning-to-rank deployments. (i) Previous work in data fusion that pre-dates learning to rank showed that while different retrieval systems could be effectively combined, the combination of multiple models within the same system was not as effective. ...
Tópico(s): Text and Document Classification Technologies
2013 - Association for Computing Machinery | ACM transactions on office information systems
Produção Nacional
Revisado por pares
Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Ranking in information retrieval has been traditionally approached as a pursuit of relevant information, under the assumption that the users' information needs are unambiguously conveyed by their submitted queries.Nevertheless, as an inherently limited representation of a more complex information need, every query can arguably be considered ambiguous to some extent.In order to tackle query ambiguity, search result diversification approaches have recently been proposed to produce rankings aimed to ...
Tópico(s): Bayesian Modeling and Causal Inference
2015 - Now Publishers | Foundations and Trends® in Information Retrieval
Produção Nacional
Revisado por pares
Harlley Lima, Thiago H. Silva, Mirella M. Moro, Rodrygo L. T. Santos, Wagner Meira, Alberto H. F. Laender,
Tópico(s): Information Science and Libraries
2015 - Springer Nature (Netherlands) | Scientometrics
Produção Nacional
Revisado por pares
Fabiano Belém, Carolina S. Batista, Rodrygo L. T. Santos, Jussara M. Almeida, Marcos André Gonçalves,
The design and evaluation of tag recommendation methods has historically focused on maximizing the relevance of the suggested tags for a given object, such as a movie or a song. However, relevance by itself may not be enough to guarantee recommendation usefulness. Promoting novelty and diversity in tag recommendation not only increases the chances that the user will select “some” of the recommended tags but also promotes complementary information (i.e., tags), which helps to cover multiple aspects ...
Tópico(s): Image Retrieval and Classification Techniques
2016 - Association for Computing Machinery | ACM Transactions on Intelligent Systems and Technology
Produção Nacional
Revisado por pares
Marcelo Ferraro-Bezerra, Rodrygo Nunes Tavares, José Rômulo de Medeiros, Alexandre Simões Nogueira, Rafael Linard Avelar, Eduardo Costa Studart Soares,
Surgically assisted rapid maxillary expansion (SARME) is a procedure routinely performed to correct transverse maxillary deformities and can be performed with or without pterygomaxillary disjunction (PD). The aim of the present study was to measure the effect of the amount of expansion and stability of SARME with or without PD.We designed and implemented a double-blind, randomized clinical trial. The patients were randomly assigned to 2 groups: group 1, SARME without PD; and group 2, SARME with PD. ...
Tópico(s): Facial Trauma and Fracture Management
2017 - Elsevier BV | Journal of Oral and Maxillofacial Surgery
Produção Nacional
Richard McCreadie, Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
During major events, such as emergencies and disasters, a large volume of information is reported on newswire and social media platforms. Temporal summarization (TS) approaches are used to automatically produce concise overviews of such events by extracting text snippets from related articles over time. Current TS approaches rely on a combination of event relevance and textual novelty for snippet selection. However, for events that span multiple days, textual novelty is often a poor criterion for ...
Tópico(s): Web Data Mining and Analysis
2018 - Association for Computing Machinery | ACM transactions on office information systems
Tópico(s): Library Science and Information
2012 - Now Publishers | Foundations and Trends® in Information Retrieval
Queries submitted to a web search engine are typically short and often ambiguous. With the enormous size of the Web, a misunderstanding of the information need underlying an ambiguous query can misguide the search engine, ultimately leading the user to abandon the originally submitted query. In order to overcome this problem, a sensible approach is to diversify the documents retrieved for the user's query. As a result, the likelihood that at least one of these documents will satisfy the user's actual ...
Tópico(s): Web Data Mining and Analysis
2012 - Association for Computing Machinery | ACM SIGIR Forum
Verónica Gil-Costa, Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Tópico(s): Text and Document Classification Technologies
2011 - Springer Science+Business Media | Lecture notes in computer science
Produção Nacional
Revisado por pares
Rodrygo Torres Córdova, Paulo Roberto de Lira Gondim, Yarisley Peña Llerena, Jaime Lloret,
Summary Mobility management applied to the traditional architecture of the Internet has become a great challenge because of the exponential growth in the number of devices that can connect to the network. This article proposes a Software‐Defined Networking (SDN)‐based architecture, called SDN‐DMM (SDN‐Distributed Mobility Management), that deals with the distributed mode of mobility management in heterogeneous access networks in a simplified and efficient way, ensuring mainly the continuity of IP ...
Tópico(s): Caching and Content Delivery
2019 - Wiley | International Journal of Communication Systems
Produção Nacional
Revisado por pares
Amado Kent Ruiz, P Ponce, Gisele de Oliveira Matos Gomes, Rinaldo Aparecido Mota, Sampaio Elizabeth, Elcyo Rodrygo Vieira de Lucena, Solange Silva Souza Benone,
Se estudiaron 11 propiedades productoras de leche bovina del estado de Pernambuco, Brasil; seis con ordeno manual y cinco con ordeno mecanico. Los rebanos estaban constituidos por animales de varias razas, edades y periodos de lactacion. Se tomaron muestras de 185 vacas, resultando en 708 cuartos muestreados. Antes de colectar se realizo la prueba de California (CMT), con independencia de este resultado fueron colectadas muestras para cultivo microbiologico y conteo de celulas somaticas (CCS) y composicion. ...
Tópico(s): Microbial infections and disease research
2011 - | Revista de salud animal
Produção Nacional
Revisado por pares
Rodrygo L. T. Santos, Pablo Roberto, Marcos André Gonçalves, Alberto H. F. Laender,
We present a new Web services-based framework for building componentized digital libraries (DLs). We particularly demonstrate how traditional RDBMS technology can be easily deployed to support several common digital library services. Configuration and customization of the framework to build specialized systems is supported by a wizard-like tool which is based on a generic metamodel for DLs. Such a tool implements a workflow process that segments the DL design tasks into well-defined steps and drives ...
Tópico(s): Semantic Web and Ontologies
2007 - Elsevier BV | Journal of Systems and Software
Verónica Gil-Costa, Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Novelty-based diversification provides a way to tackle ambiguous queries by re-ranking a set of retrieved documents. Current approaches are typically greedy, requiring O(n2) document–document comparisons in order to diversify a ranking of n documents. In this article, we introduce a new approach for novelty-based search result diversification to reduce the overhead incurred by document–document comparisons. To this end, we model novelty promotion as a similarity search in a metric space, exploiting ...
Tópico(s): Information Retrieval and Search Behavior
2012 - Elsevier BV | Journal of Discrete Algorithms
Produção Nacional
Revisado por pares
Anísio Lacerda, Rodrygo L. T. Santos, Adriano Veloso, Nívio Ziviani,
Tópico(s): Recommender Systems and Techniques
2014 - Springer Science+Business Media | Information Retrieval
Produção Nacional
Iandara Lopes Dias Barroso, Antonia Géssica dos Santos Soares, Gismailly da Silva Soares, Janayna Araújo Viana, Lílian Natália Ferreira de Lima, Matheus da Conceição Sousa, Priscila Dayane Alves Vanccin, Rodrygo de Moura Diniz,
Este estudo tem como proposito de pesquisa apresentar as principais caracteristicas acerca da prevalencia de dengue no Brasil atraves de uma revisao da literatura. Objetivo: Verificar a prevalencia da dengue no Brasil, segundo a literatura. Metodologia: Trata-se de um estudo de natureza integrativa com abordagem qualitativa, com dados provenientes da literatura. Resultados e Discussao: Os casos de dengue vem aumentando anualmente e esse aumento acentuado associa-se a introducao e/ou circulacao de ...
Tópico(s): Mosquito-borne diseases and control
2020 - Brazilian Journal of Development | Brazilian Journal of Development
Rodrygo L. T. Santos, Craig Macdonald, Iadh Ounis,
Many enterprise employees may publish content outside their corporate intranet, making the Web a valuable source for identifying company experts. In this article, we thoroughly investigate the usefulness of Web search engines (WSEs) for expert search. In particular, we claim that the ranking of documentary expertise evidence provided by a WSE should also give an indication of the importance of such evidence. To investigate this, we mimic the rankings of seven different WSEs by trying to reproduce ...
Tópico(s): Information Retrieval and Search Behavior
2011 - Elsevier BV | Information Processing & Management
Produção Nacional
Revisado por pares
Ramon Lopes, Renato Assunção, Rodrygo L. T. Santos,
Graph-based approaches provide an effective memory-based alternative to latent factor models for collaborative recommendation. Modern approaches rely on either sampling short walks or enumerating short paths starting from the target user in a user-item bipartite graph. While the effectiveness of random walk sampling heavily depends on the underlying path sampling strategy, path enumeration is sensitive to the strategy adopted for scoring each individual path. In this article, we demonstrate how ...
Tópico(s): Caching and Content Delivery
2019 - Association for Computing Machinery | ACM Transactions on Intelligent Systems and Technology
Produção Nacional
Revisado por pares
Rodrygo L. T. Santos, Pablo Roberto, Marcos André Gonçalves, Alberto H. F. Laender,
Although component-based architectures favor the building and extension of digital libraries, the configuration of such systems is not a trivial task. Our approach to simplify the tasks of constructing and customizing component-based digital libraries is based on an assistant tool: a setup wizard that segments those tasks into well-defined steps and drives the user along these steps. For generality purposes, the architecture of the wizard is based on the 5S framework and different wizard versions ...
Tópico(s): Peer-to-Peer Network Technologies
2006 - Springer Science+Business Media | Lecture notes in computer science
Produção Nacional
Letícia dos Santos Pereira, Rodrygo Figueiredo Moço, Gustavo Henrique Bolognesi Donato,
The development of robust protocols for assessing the structural integrity of gas pipelines is of paramount relevance, since failures can lead to financial and human losses. In this scenario, the material's ability to slow down the propagation of a running crack (crack arrest) becomes a design requirement. Several empirical models and criteria, calibrated by real pipeline burst tests, have been developed, being the Battele Two Curve Method (BTCM) one example of technique widely employed during decades. ...
Tópico(s): Structural Integrity and Reliability Analysis
2018 - Elsevier BV | Procedia Structural Integrity
Produção Nacional
Revisado por pares
Saulo Ellery Santos, Rodrygo Nunes Tavares, Márcio de Moraes, Francisco Wagner Vasconcelos Freire-Filho,
Sagittal osteotomy was primarily described as a treatment for prognathism and retrognathia. It has been rarely reported as an option for the removal of deeply impacted tooth. The principal indication of this approach is when the tooth is deeply impacted on the mandibular ramus or body and it presents intimate relationship between its root and inferior alveolar neurovascular bundles. In this article the author related three rare cases of lower third molar included. Because of the unusual deeply position ...
Tópico(s): dental development and anomalies
2013 - Springer Science+Business Media | Journal of Maxillofacial and Oral Surgery
Produção Nacional
Revisado por pares
George Táccio de Miranda Candeiro, Rodrygo Nunes Tavares,
A ocorrência de caninos inferiores impactados não é incomum na prática clínica odontológica diária. Assim, diversas modalidades de tratamento são propostas, com o objetivo principal de tentar reposicionar o dente para o arco dentário, estabilizando a oclusão, promovendo uma harmonia estética e funcional. Entretanto, o tracionamento ortodôntico desses dentes quando presentes na linha média mandibular se torna difícil de ser realizado. O objetivo deste artigo foi fazer o relato do tratamento cirúrgico, ...
Tópico(s): Dental Radiography and Imaging
2009 - Associação Sul-Rio-Grandense de Pesquisadores em História da Educação (ASPHE) | Revista da Faculdade de Odontologia de Porto Alegre
Produção Nacional
Revisado por pares
Anísio Lacerda, Adriano Veloso, Rodrygo L. T. Santos, Nívio Ziviani,
Daily deals sites, such as Groupon and LivingSocial, attract millions of customers in the hunt for products and services at substantially reduced prices (i.e., deals). An important aspect for the profitability of these sites is the correct prediction of how many coupons will be sold for each deal in their catalog—a task commonly referred to as deal size prediction. Existing solutions for the deal size prediction problem focus on one deal at a time, neglecting the existence of similar deals in the ...
Tópico(s): Digital Marketing and Social Media
2014 - Springer Science+Business Media | Lecture notes in computer science