... figure present, but the portrayal of the characters Jugurta and Bariato has been virtually ignored by scholarship ... prominente, pero la representación de los personajes de Jugurta y Bariato ha sido prácticamente ignorada por la ...
Tópico(s): Historical Studies on Spain
2007 - Liverpool University Press | Bulletin of Hispanic Studies
Produção Nacional
Revisado por pares
Jugurta Montalvão, Eduardo Oliveira Freire,
The effect of parametric equalization of time interval histograms (key down–down intervals) on the performance of keystroke-based user verification algorithms is analyzed. Three algorithms are used throughout this analysis: a classic one for static (structured) texts, a second one, also proposed in literature, for both static and arbitrary (free) text, and a new one for arbitrary text based verification. Their performances are reported before and after time interval histogram equalization, and the ...
Tópico(s): Handwritten Text Recognition Techniques
2006 - Elsevier BV | Pattern Recognition Letters
Produção Nacional
Revisado por pares
Jugurta Lisboa Filho, Victor de Freitas Sodré, Jaudete Daltio, Maurício Fidelis Rodrigues Júnior, Valério Moysés Vilela,
Tópico(s): Advanced Database Systems and Queries
2004 - Springer Science+Business Media | Lecture notes in computer science
Produção Nacional
Revisado por pares
Jugurta Montalvão, Eduardo Oliveira Freire, Murilo A. Bezerra, Rodolfo V. García,
Rhythmic patterns in passwords are addressed through biometric verification tests. Experimental results are obtained through three publicly available databases, whereas experiments are guided by questions Q1: How does a subject develop a stable rhythmic signature associated to a new password? and Q2: How does the number of symbols affect biometric performance? Measurements show that even if subjects are instructed to train themselves before sample acquisition, a clear habituation phenomenon is noticed ...
Tópico(s): Biometric Identification and Security
2014 - Elsevier BV | Pattern Recognition Letters
Produção Nacional
Revisado por pares
Jugurta Lisboa Filho, Cirano Iochpe, Karla A. V. Borges,
An analysis pattern is any part of a requirement analysis specification that can be reused in the design of other information systems as well. Urban management systems (e.g.: Tax Control Systems, Urban Transportation System) are implemented in a similar way for many counties. This paper proposes three analysis patterns that make possible the reuse of geographic database design for urban area planning and management applications, developed in Geographic Information System (GIS).
Tópico(s): Data Management and Algorithms
2018 - Latin American Center for Computer Studies | CLEI electronic journal
Produção Nacional
Revisado por pares
Reginaldo Barnabé Gonzalez Grimaldi, Talita Santos Alves Chagas, Jugurta Montalvão, Núbia Silva Dantas Brito, W. C. Santos, Tarso Vilela Ferreira,
In many situations, conductor rupture in distribution systems or even its contact with structures external to the systems (such as trees) does not sensitize protection systems. This type of occurrence and its variations are typically called high impedance faults. The present work proposes a method for detection of high impedance faults based on linear prediction. Concerning validation of the method, a database was created through simulations performed in the Alternative Transients Program, based ...
Tópico(s): Electrical Fault Detection and Protection
2020 - Elsevier BV | Electric Power Systems Research
Produção Nacional
Revisado por pares
Jarbas Nunes Vidal-Filho, Jugurta Lisboa Filho, Wagner Dias de Souza, Gérson Rodrigues dos Santos,
The increase of data sources on the Internet and Web 2.0 advances have contributed to significant changes in the way we produce spatial information. The citizen is using collaborative environments to produce their own data, whether in the area of public security, infrastructure or for simple fun. The voluntary contribution is essential to make a spatially enabled society and help in decision-making process at all levels of a society, whether governmental, private or by the citizen. Analyzing the ...
Tópico(s): Human Mobility and Location-Based Analysis
2013 - Springer Science+Business Media | Lecture notes in computer science
Produção Nacional
Revisado por pares
Jugurta Montalvão, Lucas Molina, Jânio Canuto,
Tópico(s): Handwritten Text Recognition Techniques
2010 - Springer Science+Business Media | Pattern Analysis and Applications
Produção Nacional
Revisado por pares
Jugurta Montalvão, Bernadette Dorizzi, J.C.M. Mota,
A new blind channel estimation algorithm is presented. This algorithm comes from the well-known maximum likelihood estimation approach. However, we intentionally "smooth" the joint probability density function (PDF) of a finite set of observations in order to reduce the computational burden. As a result, we obtain an online clustering algorithm whose main characteristic is the constraint of symmetry among cluster centers. Computational simulations are used to evaluate this algorithm.
Tópico(s): Algorithms and Data Compression
2002 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Signal Processing
Produção Nacional
Lucas Francisco da Matta Vegi, Douglas Alves Peixoto, Liziane Santos Soares, Jugurta Lisboa Filho, Alcione de Paiva Oliveira,
Patterns have been employed as a mechanism for reuse in several phases of software development. Analysis patterns consist of artifacts for reuse during the requirements analysis and conceptual modeling. However, they are generally, documented in a textual manner which is not precise to be treated by a computer, thus limiting the dissemination and a wider reuse. Within the geo-processing area, Spatial Data Infrastructures (SDI) has been used quite effectively as an instrument for the reuse of geospatial ...
Tópico(s): Business Process Modeling and Analysis
2012 - Springer Science+Business Media | Lecture notes in business information processing
Jugurta Bouidghaghen, Laurence Moreau, Katia Beauchêne, Romain Chapuis, Nathalie Mangel, Llorenç Cabrera‐Bosquet, Claude Welcker, Matthieu Bogard, François Tardieu,
Breeding for resilience to climate change requires considering adaptive traits such as plant architecture, stomatal conductance and growth, beyond the current selection for yield. Robotized indoor phenotyping allows measuring such traits at high throughput for speed breeding, but is often considered as non-relevant for field conditions. Here, we show that maize adaptive traits can be inferred in different fields, based on genotypic values obtained indoor and on environmental conditions in each considered ...
Tópico(s): Genetic and phenotypic traits in livestock
2023 - Nature Portfolio | Nature Communications
Produção Nacional
Revisado por pares
Alex da Silva Santos, Nilcilene das Graças Medeiros, Gérson Rodrigues dos Santos, Jugurta Lisboa Filho,
Abstract: In the area of Geosciences it is intuitive to think of spatial correlation as a phenomenon under study, and Geostatistics has tools to identify and represent the behavior of such dependency. The spatial analysis of the results of an inspection of the quality of a cartographic product is generally not addressed in the standards, which are restricted to descriptive and tabular findings, based on the assumption of the Classical Statistics of independence of observed data. At the Brazilian ...
Tópico(s): Geography and Environmental Studies
2017 - UNIVERSIDADE FEDERAL DO PARANÁ | Boletim de Ciências Geodésicas
Produção Nacional
Jugurta Montalvão, Romis Attux, Daniel G. Silva,
A pragmatic approach for entropy estimation is presented, first for discrete variables, then in the form of an extension for handling continuous and/or multivariate ones. It is based on coincidence detection, and its application leads to algorithms with three main attractive features: they are easy to use, can be employed without any a priori knowledge concerning source distribution (not even the alphabet cardinality K of discrete sources) and can provide useful estimates even when the number of ...
Tópico(s): Bayesian Methods and Mixture Models
2014 - | Journal of Communication and Information Systems
Produção Nacional
Revisado por pares
Daniel G. Silva, Jugurta Montalvão, Romis Attux, Luis Cláudius Coradine,
This work proposes a new approach to the blind inversion of Wiener systems. A Wiener system is composed of a linear time-invariant (LTI) sub-system followed by a memoryless nonlinear function. The goal is to recover the input signal by knowing just the output of the Wiener system, and the straightforward scheme to achieve this is called the Hammerstein system – apply a memoryless nonlinear mapping followed by a LTI sub-system to the output signal of the Wiener system. If the input of the Wiener system ...
Tópico(s): Control Systems and Identification
2015 - Elsevier BV | Signal Processing
Produção Nacional
Revisado por pares
Intrinsic dimensional analysis and differential entropy estimation are closely related to the point that they can be jointly estimated as two complementary outputs of a single approach. In this brief letter, it is shown that, given a noisy signal, intrinsic dimension and differential entropy, jointly analyzed through visual approach, can be used to estimate noise variance directly from noisy signal samples. Preliminary results corroborating this idea are presented through experiments with chaotic ( ...
Tópico(s): Speech and Audio Processing
2019 - Institute of Electrical and Electronics Engineers | IEEE Signal Processing Letters
Produção Nacional
Revisado por pares
Jugurta Montalvão, Marcos Renato Rodrigues Araujo,
We hypothesize that spectral masking may account for most of the gains in robustness against noise using ensemble interval histogram (EIH) and zero crossing with peak amplitude (ZCPA) compared to Mel-frequency cepstral coefficients (MFCCs). To test this hypothesis, we focus on this issue by comparing two MFCC implementations for which the only difference is spectral masking. The comparison involved biometric speaker verification tasks using two publicly available databases. The results confirm the ...
Tópico(s): Music and Audio Processing
2012 - Elsevier BV | Pattern Recognition Letters
Produção Nacional
Revisado por pares
Daniel G. Silva, Everton Z. Nadalin, Jugurta Montalvão, Romis Attux,
In 2007, a theory of ICA over finite fields emerged and an algorithm based on pairwise comparison of mixtures, called MEXICO, was developed to deal with this new problem. In this letter, we propose improvements in the method that, according to simulations in GF(2) and GF(3) scenarios, lead to a faster convergence and better separation results, increasing the application possibilities of the new theory in the context of large databases.
Tópico(s): Neural Networks and Applications
2013 - Elsevier BV | Signal Processing
Produção Nacional
Revisado por pares
Daniel G. Silva, Everton Z. Nadalin, Guilherme Palermo Coelho, Leonardo Tomazeli Duarte, Ricardo Suyama, Romis Attux, Fernando J. Von Zuben, Jugurta Montalvão,
In this work, we present a novel bioinspired framework for performing ICA over finite (Galois) fields of prime order P. The proposal is based on a state-of-the-art immune-inspired algorithm, the cob-aiNet[C], which is employed to solve a combinatorial optimization problem — associated with a minimal entropy configuration — adopting a Michigan-like population structure. The simulation results reveal that the strategy is capable of reaching a performance similar to that of standard methods for lower-dimensional ...
Tópico(s): Machine Learning in Bioinformatics
2013 - Elsevier BV | Signal Processing
Produção Nacional
Revisado por pares
Jugurta Montalvão, Bernadette Dorizzi, J.C.M. Mota,
A brief overview of Bayesian equalizers will be given. Knowing that all realistic implementations of Bayesian equalizers are approximations of the optimal one (in the sense of minimum decision error probability), we review some classical implementations found in literature and we study the performance degradation induced by the use of finite memory Bayesian equalizers instead of growing memory structures. Finally, we also point out some new ideas and results concerning sub-optimal Bayesian structures.
Tópico(s): Neural Networks and Reservoir Computing
2001 - Elsevier BV | Signal Processing
Produção Nacional
Revisado por pares
Daniela Bertolini Depizzol, Jugurta Montalvão, Fabio de Oliveira Lima, Marcia Helena Moreira Paiva, Marcelo E. V. Segatto,
An efficient design of optical networks is a complex challenge that requires knowledge of the desired performance trends. Such knowledge would have a potential impact on an expert system to this end, for instance, would help identify reliable topological parameters to characterize the desired behavior of the network. Feature selection from information theory is widely explored in many areas of expert and intelligent systems, and it is a suitable technique to choose such parameters. In optical networks, ...
Tópico(s): Advanced Photonic Communication Systems
2018 - Elsevier BV | Expert Systems with Applications
José Manuel Pabón: C. Salustio Crispo, Catilina y Jugurta. Vol. ii: Guerra de Jugurta. (Collección Hispánica.) Pp. 205 (22–145 double). Barcelona: ...
Tópico(s): Urbanism, Landscape, and Tourism Studies
1961 - Cambridge University Press | The Classical Review
Produção Nacional
Revisado por pares
Jugurta Montalvão, Romis Attux, Daniel G. Silva,
A pragmatic approach for entropy estimation is presented. It is based on coincidence detection and its application leads to a simple algorithm with two attractive features: the method can be used without any a priori knowledge concerning the source alphabet cardinality (K) and it can provide useful, though biased, estimates even when the number of samples is less than K.
Tópico(s): Blind Source Separation Techniques
2012 - Institution of Engineering and Technology | Electronics Letters
Produção Nacional
Revisado por pares
Jugurta Lisboa Filho, Lucas Francisco da Matta Vegi, Wagner Dias de Souza, João Paulo Campolina Lamas, Glauber Luis da Silva Costa, Wellington Moreira de Oliveira, Rafael da Silva Carrasco, Tiago Geraldo Ferreira, Joás Weslei Baía,
Em 2008, o Decreto 6666 determinou o estabelecimento da Infraestrutura Nacional de Dados Espaciais (INDE). Em 2010, a Comissão Nacional de Cartografia (CONCAR) apresentou o Plano de Ação para a implantação da INDE. Com isto, a idéia de compartilhamento de dados geoespaciais ganha um novo impulso junto à comunidade de usuários de dados e sistemas georreferenciados. Uma iniciativa pioneira de disponibilização de dados geoespaciais de âmbito estadual foi o site www.geominas.mg.gov.br, publicado em 1995, ...
Tópico(s): Geographic Information Systems Studies
2013 - UNIVERSIDADE FEDERAL DE UBERLÂNDIA | Revista Brasileira de Cartografia
Produção Nacional
Revisado por pares
Jarbas Nunes Vidal-Filho, Valéria Cesário Times, Jugurta Lisboa Filho, Chiara Renso,
The term Semantic Trajectories of Moving Objects (STMO) corresponds to a sequence of spatial-temporal points with associated semantic information (for example, annotations about locations visited by the user or types of transportation used). However, the growth of Big Data generated by users, such as data produced by social networks or collected by an electronic equipment with embedded sensors, causes the STMO to require services and standards for enabling data documentation and ensuring the quality ...
Tópico(s): Service-Oriented Architecture and Web Services
2021 - Multidisciplinary Digital Publishing Institute | ISPRS International Journal of Geo-Information
Reviewed by: Pratique révision B1 by Jugurta Bentifraouine, et Philippe Liria Jessica L. Sturm Bentifraouine, Jugurta, et Philippe Liria. Pratique révision B1. Clé International, 2022. ISBN 978-209-038995- ...
Tópico(s): Diverse multidisciplinary academic research
2022 - American Association of Teachers of French | The French review
... José Manuel Pabón: C. Salustio Crispo, Catilina y Jugurta. Vol. i: Conjuratión de Catilina. (Collectión Hispánica.) Pp. ...
Tópico(s): Historical Art and Architecture Studies
1956 - Cambridge University Press | The Classical Review
Produção Nacional
Odilon Corrêa da Silva, Jugurta Lisboa Filho, José Luís Braga, Karla A. V. Borges,
Concern for environmental issues has become a reality in all sectors of society, mainly among researchers and professionals who work directly with environmental status. In this context, several studies have been undertaken on sustainable development of the Brazilian Amazon, generating a large amount of data and information. Environmental area characterization involves the knowledge about their natural, economic and social resources, as well as understanding the interaction and correlation among ...
Tópico(s): Data Management and Algorithms
2009 - Springer Science+Business Media | Earth Science Informatics
Filipe Ribeiro Nalon, Jugurta Lisboa Filho, José Luís Braga, Karla Albuquerque de Vasconcelos Borges, Marcus V. A. Andrade,
In the last 20 years, several conceptual data models specific for Geographic Information Systems (GIS) have been proposed. However, so far there isn’t a consensus model, which has generated several problems for the GIS area, such as the lack of interoperability among CASE tools that give support to these models. A UML profile, called GeoProfile, was proposed to standardize the task of geographical data modeling. The GeoProfile was designed based on the main models for geographic database in the literature, ...
Tópico(s): Model-Driven Software Engineering Techniques
2011 - | Journal of Information and Data Management
Produção Nacional
Rafael da Silva Carrasco, Alcione de Paiva Oliveira, Jugurta Lisboa Filho, Alexandra Moreira,
The illegal trade of wild animals is one of the most lucrative criminal activities.In Brazil, the wide variety of native wildlife has fed the illegal market, which has serious environmental and social implications.The fight against illegal trade of wild animals is crucial to help protect natural resources and preventing the spread of other forms of crime.This type of illegal trade has been making increasingly use of the Internet to carry out their activities.In order to fight against this criminal ...
Tópico(s): Food Supply Chain Traceability
2014 - UNIVERSIDADE DE PASSO FUNDO | Revista Brasileira de Computação Aplicada
Jugurta Montalvão, Jânio Canuto,
In this paper, the seminal method proposed by Abraham Lempel and Jacob Ziv, aimed at the complexity analysis of sequences of symbols, was modified to compare similarities between two sequences. This modification allowed the creation of a new criterion which can replace likelihood in some pattern recognition applications. Moreover, to allow for analysis and comparison of multivariate continuously valued patterns, we also present a simple adaptation of the Lempel-Ziv's method to time-sampled signals. ...
Tópico(s): Fractal and DNA sequence analysis
2014 - Sociedade Brasileira de Matemática Aplicada e Computacional | TEMA (São Carlos)