RSS 1.0Departamento de Ciência da Computação e Estatística
Browse by
Recent Submissions
-
Data warehouse design to support social media analysis in a big data environment
Valêncio, Carlos Roberto
; Silva, Luis Marcello Moraes ; Tenório, William ; Zafalon, Geraldo Francisco Donegá ; ; (Journal of Computer Science, 2020) [Artigo]
The volume of generated and stored data from social media has increased in the last decade. Therefore, analyzing and understanding this kind of data can offer relevant information in different contexts and can assist ... -
Analysing research collaboration through co-authorship networks in a big data environment: An efficient parallel approach
Valêncio, Carlos Roberto; De Freitas, José Carlos ; De Souza, Rogéria Cristiane Gratão ; Neves, Leandro Alves ; Zafalon, Geraldo Francisco Donegá ; ; Tenório, William (International Journal of Computational Science and Engineering, 2020) [Artigo]
Bibliometry is the quantitative study of scientific productions and enables the characterisation of scientific collaboration networks. However, with the development of science and the increase of scientific production, ... -
Automated acoustic detection of a cicadid pest in coffee plantations
; Guido, Rodrigo Capobianco; ; ; ; (Computers and Electronics in Agriculture, 2020) [Artigo]
South american countries are the largest coffee producers in the world. Nevertheless, Cicadidae, the colloquial term for cicadas, is one of the key pests responsible for dropping the production. Currently, there is no ... -
Wavelet-packets Associated with Support Vector Machine Are Effective for Monophone Sorting in Music Signals
Scalvenzi, Rafael Rubiati; Guido, Rodrigo Capobianco ; Marranghello, Norian (International Journal of Semantic Computing, 2019) [Artigo]
An abstract interpretation is usually required to analyze acoustic compositions. Nevertheless, there is much signal processing-related research focusing on music processing and similar topics. In that context, the semantic ... -
Acoustic investigation of speech pathologies based on the discriminative paraconsistent machine (DPM)
Fonseca, Everthon Silva; Guido, Rodrigo Capobianco ; ; ; ; (Biomedical Signal Processing and Control, 2020) [Artigo]
Background: Voice disorders are related to both modest and severe health problems, including discomfort, pain, difficulty speaking, dysphagia and also cancer. Widely adopted worldwide, the combined invasive and subjective ... -
A systematic review of fault tolerance solutions for communication errors in open source cloud computing
Santos, Vinicius Andrade Dos; Manacero, Aleardo ; Lobato, Renata S. ; Spolon, Roberta ; (Iberian Conference on Information Systems and Technologies, CISTI, 2020) [Trabalho apresentado em evento]
Cloud systems, as any other system, must be reliable. This means that the system should respond correctly in presence of failures, which are quite probable in a distributed, largely independent, system as cloud systems ... -
Improving virtual machine consolidation for heterogeneous cloud computing datacenters
Rodrigues, Joao Antonio Magri; ; Lobato, Renata Spolon ; Spolon, Roberta ; Manacero, Aleardo ; (Proceedings - Symposium on Computer Architecture and High Performance Computing, 2019) [Trabalho apresentado em evento]
Datacenters in cloud computing systems may consist of thousands of computing nodes and communication devices, requiring virtual machine placement to optimize resources utilization. Heterogeneous environments of current ... -
Classification of breast and colorectal tumors based on percolation of color normalized images
; ; ; ; ; Neves, Leandro A. (Computers and Graphics (Pergamon), 2019) [Artigo]
Percolation is a fractal descriptor that has been applied recently on computer vision problems. We applied this descriptor on 58 colored histological breast images, and 165 colored histological colorectal images, both ... -
Using a distance map and an active contour model to segment the carotid artery boundary from the lumen contour in proton density weighted magnetic resonance images
; ; ; Pereira, Aledir Silveira; (Computers In Biology And Medicine, 2020) [Artigo]
Segmentation methods have assumed an important role in image-based diagnosis of several cardiovascular diseases. Particularly, the segmentation of the boundary of the carotid artery is demanded in the detection and ... -
Classification of calcified regions in atherosclerotic lesions of the carotid artery in computed tomography angiography images
; Pereira, Aledir Silveira; (Neural Computing & Applications, 2020) [Artigo]
The identification of atherosclerotic plaque components, extraction and analysis of their morphology represent an important role towards the prediction of cardiovascular events. In this article, the classification of regions ... -
Software Architecture for Web-based Project Management System
Neves Esteca, Antonio Marcos; Gratao de Souza, Rogeria Cristiane ; Santos, Adriana Barbosa ; ; (16th International Conference On Distributed Multimedia Systems (dms 2010), 2010) [Trabalho apresentado em evento]
This article presents software architecture for a web-based system to aid project managing, conceptually founded on guidelines of the Project Management Body of Knowledge (PMBoK) and on ISO/IEC 9126, as well as on the ... -
GBD IAAS Manager: A Tool for Managing Infrastructure-as-a-Service for Private and Hybrid Clouds
Valencio, Carlos Roberto; Silva, Andrielson Ferreira da ; Guimaraes, Diogo Lemos ; Cansian, Adriano Mauro ; ; Roschildt Pinto, Alex Sandro ; (2013 International Conference On Parallel And Distributed Computing, Applications And Technologies (pdcat), 2013) [Trabalho apresentado em evento]
The increase in the demand for computing resources with scalable infrastructure and easily managed has stimulated the emergence of IaaS - Infrastructure-as-a-Service - providers in public clouds, as well as the creation ... -
Real Time Delta Extraction Based on Triggers to Support Data Warehousing
Valencio, Carlos Roberto; Marioto, Matheus Henrique ; Donega Zafalon, Geraldo Francisco ; Machado, Jose Marcio ; Momente, Julio Cesar ; (2013 International Conference On Parallel And Distributed Computing, Applications And Technologies (pdcat), 2013) [Trabalho apresentado em evento]
Nowadays large corporations require integrated data from diverse sources, leading to the use of data warehouse architectures for this purpose. To bypass problems related to the use of computational resources to process ... -
Automatic Knowledge Extraction Supported by Semantic Enrichment in Medical Records
Valencio, Carlos Roberto; Martins, Rodrigo Dulizio ; Marioto, Matheus Henrique ; ; Babini, Maurizio ; (2013 International Conference On Parallel And Distributed Computing, Applications And Technologies (pdcat), 2013) [Trabalho apresentado em evento]
The volume of digital information is growing considerably in the last two decades and there is currently a huge concern about obtaining this content quickly and effectively. In the health sector it is not different; to ... -
VDBSCAN plus : Performance Optimization Based on GPU Parallelism
Valencio, Carlos Roberto; Daniel, Guilherme Priolli ; Medeiros, Camila Alves de ; Cansian, Adriano Mauro ; Baida, Luiz Carlos ; Ferrari, Fernando ; (2013 International Conference On Parallel And Distributed Computing, Applications And Technologies (pdcat), 2013) [Trabalho apresentado em evento]
Spatial data mining techniques enable the knowledge extraction from spatial databases. However, the high computational cost and the complexity of algorithms are some of the main problems in this area. This work proposes a ... -
Petri nets and autonomous systems: a case study
Leite, Guilherme Eduardo; Marranghello, Norian ; Pereira, Aledir Silveira ; (2009 Ieee Conference On Emerging Technologies & Factory Automation (efta 2009), 2009) [Trabalho apresentado em evento]
This work presents the Petri net-based modeling of an autonomous robot's navigation system used for the application of supplies in agriculture. The model was developed theoretically and implemented through the CPNTools ... -
Mobile application as a tool for urban traffic data collection and generation to Advanced Traveler Information Systems using Wi-Fi networks available in urban centers
; ; Marranghello, Norian; ; ; (2012 Ieee Intelligent Vehicles Symposium (iv), 2012) [Trabalho apresentado em evento]
This paper presents an Advanced Traveler Information System (ATIS) developed on Android platform, which is open source and free. The developed application has as its main objective the free use of a Vehicle-to-Infrastructure ... -
The Cross-Entropy Method and its Application to Minimize the Ripple of the Magnetic levitating Forces of a Maglev System
; ; Machado, Jose Marcio; ; ; (Applied Electromagnetics And Mechanics (ii), 2009) [Trabalho apresentado em evento]
The Cross-Entropy (CE) method is developed and applied to minimize the ripple of the magnetic levitating forces of a maglev system with promising results. -
An Energy-aware Task Scheduler Based in Ownership Fairness Applied to Federated Grids
Forte, Cassio H. V.; Manacero, Aleardo ; Lobato, Renata S. ; Spolon, Roberta ; (2018 Ieee Symposium On Computers And Communications (iscc), 2018) [Trabalho apresentado em evento]
The increasing complexity and the large volume of data used by applications lead to an ever-increasing use of high-performance distributed systems. The right management of energy consumption became a major challenge to ... -
Unsupervised method for normalization of hematoxylin-eosin stain in histological images
; ; ; Neves, Leandro Alves; ; ; (Computerized Medical Imaging And Graphics, 2019) [Artigo]
Histological images stained with hematoxylin-eosin are widely used by pathologists for cancer diagnosis. However, these images can have color variations that highly influence the histological image processing techniques. ...