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Email spam detection : a symbiotic feature selection approach fostered by evolu...
Sousa, Pedro; Cortez, Paulo, 1971-; Vaz, Rui Fernando Martins; Rocha, Miguel; Rio, MiguelPost-print version (prior to journal publication) ; The electronic mail (email) is nowadays an essential communication service being widely used by most Internet users. One of the main problems affecting this service is the proliferation of unsolicited messages (usually denoted by spam) which, despite the efforts made by the research community, still remains as an inherent problem affecting this Internet servi...
Early pseudoprogression following chemoradiotherapy in glioblastoma patients : ...
Reis, R. M.; Linhares, Paulo; Carvalho, Bruno; Figueiredo, Rita; Vaz, RuiEarly Pseudo-progression Following Chemoradiotherapy in Glioblastoma Patients: The Value of RANO Evaluation ; The aim of this study was to determine the frequency of pseudoprogression in a cohort of glioblastoma (GBM) patients following radiotherapy/temozolomide (RT/TMZ) by comparing Macdonald criterial to Response Assessment in Neuro-Oncology (RANO) criteria. The impact on prognosis and survival analysis was ...
Estratégias de filtragem Anti-Spam baseadas em técnicas de computação evolucion...
Vaz, Rui Fernando MartinsDissertação de mestrado integrado em Engenharia de Comunicações ; O serviço de correio eletrónico é atualmente um serviço de comunicação essencial, que assume uma crescente importância na sociedade atual. No entanto, apesar dos vários esforços concentrados contra o correio eletrónico (email) não solicitado, designado também por spam, este continua a ser ainda um problema inerente a este serviço. No quadro das ...
Evolutionary symbiotic feature selection for email spam detection
Cortez, Paulo, 1971-; Vaz, Rui Fernando Martins; Rocha, Miguel; Rio, Miguel; Sousa, PedroThis work presents a symbiotic filtering approach enabling the exchange of relevant word features among different users in order to improve local anti-spam filters. The local spam filtering is based on a Content- Based Filtering strategy, where word frequencies are fed into a Naive Bayes learner. Several Evolutionary A l gori thms are expl ored f or f eature sel ecti on, i ncl udi ng the proposed symbi oti c ex...
Impact of EGFR genetic variants on glioma risk and patient outcome
Costa, Bruno Marques; Pereira, Marta Viana; Fernandes, Ricardo; Costa, S.; Linhares, Paulo; Vaz, Rui; Pinheiro, Céline; Lima, Jorge; Soares, PaulaB.M. Costa and M. Viana-Pereira contributed equally to this work; The authors thank the Immunochemotherapy Department of Hospital S. Marcos, and Clinica Laboratorial Dr. Edgar Botelho Moniz, S. Tirso, Portugal, for their helpful assistance in the management of controls ; BACKGROUND: The epidermal growth factor receptor (EGFR) regulates important cellular processes and is frequently implicated in human tumors. ...
Imaging in Parkinson disease surgery.
Basto, Margarida A; Linhares, Paulo; Sousa, Armando N; Rosas, M José; Garrett, Carolina; Mendes, Alexandre; Fonseca, Rosália; Amaral, Cristina; Vaz, RuiParkinson's disease is a progressive degenerative disease of the central nervous system frequently becoming motor disabling. Deep brain stimulation is one more therapeutic option. The authors describe the different steps of this therapeutic procedure with detail on imaging protocol to the precise and exact targeting of subthalamic nucleus. MR and CT imaging on stereotactic conditions are the imaging support to ...
Prevalência, comportamentos de risco e níveis de informação sobre a esquistosso...
Gujral,Lorna; Vaz,Rui GamaPara determinar a prevalência, identificar os comportamentos de risco e os níveis de informação sobre a esquistossomose urinária, realizou-se um estudo transversal, entre outubro e novembro de 1996, em três escolas primárias da Área de Saúde 1º de Junho, na cidade de Maputo, Moçambique. Efetuaram-se inquéritos epidemiológicos e recolheram-se amostras únicas de urina de 434 escolares de ambos os sexos, seleciona...
Cerebrospinal fluid cytomorphologic findings in 41 intracranial tumors: a retro...
Sá,Maria José; Vaz,Rui; Cruz,CelsoThe main objective of this retrospective review of clinical and cerebrospinal fluid (CSF) data from 41 patients with intracranial tumors diagnosed between 1975 and 1989, is to report the role that the finding of neoplastic cells in CSF plays, specially when cerebral CT-scanning and MRI were not currently done. Another objective is to study the CSF proteic abnormalities in cerebral tumors. CSF cell count, cytomo...
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