Gustavo R. L. Silva

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BACKGROUND To investigate the available data on the treatment of early colorectal cancer (CRC), either endoscopically or surgically. METHODS Two independent reviewers searched MEDLINE, EMBASE, CENTRAL COCHRANE, LILACS and EBSCO for articles published up to August 2015. No language or dates filters were applied. Inclusion criteria were studies with(More)
BACKGROUND Zenker's diverticulum is a rare disease in the general population. Its treatment can be carried out by either an endoscopic or surgical approach. The objective of this study was to systematically identify all reports that compare both treatment modalities and to assess the outcomes in terms of length of procedure, length of hospitalization, time(More)
BACKGROUND Abdominal pain is present in the vast majority of patients with chronic pancreatitis, being frequently debilitating. Celiac plexus block (CPB) is an interventional technique that can be considered to provide a temporary pain relief. OBJECTIVE To estimate the effectiveness and safeness of endoscopic-ultrasound (EUS) comparing with(More)
This paper presents a novel algorithm for multiobjective training of Radial Basis Function (RBF) networks based on least-squares and Particle Swarm Optimization methods. The formulation is based on the fundamental concept that supervised learning is a bi-objective optimization problem, in which two conflicting objectives should be minimized. The objectives(More)
Endocardial ablation has long been used to treat cardiac arrhythmias. However, the indications for epicardial intervention via the pericardial space have continuously increased since the technique was first described [1–3]. A subxiphoid puncture is used to access the pericardial space (●" Fig.1a,●" Fig.1b), allowing epicardial mapping and ablation (●"(More)
This work presents a new clustering algorithm, the GPIC, a Graphics Processing Unit (GPU) accelerated algorithm for Power Iteration Clustering (PIC). Our algorithm is based on the original PIC proposal, adapted to take advantage of the GPU architecture, maintining the algorith original properties. The proposed method was compared against the serial and(More)
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