A5021212312- Natural Language Processing Techniques
- Topic Modeling
- Mechanical Circulatory Support Devices
- ECG Monitoring and Analysis
- Online Learning and Analytics
- Petri Nets in System Modeling
- Formal Methods in Verification
- Cardiac Structural Anomalies and Repair
- Software Engineering Techniques and Practices
- Software Engineering Research
- Education and Digital Technologies
- Digital Games and Media
- Cardiac pacing and defibrillation studies
- Cardiovascular Function and Risk Factors
- Oil Spill Detection and Mitigation
- COVID-19 diagnosis using AI
- Advanced Text Analysis Techniques
- Educational Games and Gamification
- Usability and User Interface Design
- Fuel Cells and Related Materials
- E-Learning and Knowledge Management
- Text Readability and Simplification
- Geography and Environmental Studies
- Embedded Systems Design Techniques
- Safety Systems Engineering in Autonomy
Universidade Federal de Alagoas
2015-2025
Federal Institute of Education, Science and Technology Alagoas
2023-2024
Universidade Federal de Campina Grande
2015-2023
Universidade Federal Rural da Amazônia
2023
Universidade de Pernambuco
2010-2013
Universidade Federal do Pará
2010
Centro Universitário Salesiano de São Paulo
2009
The Electrocardiogram (ECG) is a low-cost exam commonly used to diagnose abnormalities in the cardiac cycle. Over years, scientific community has investigated automatic classification of ECG signals driven by advanced Machine Learning (ML) techniques. Despite recent advances, annotating large and diverse datasets support training ML techniques still very time-consuming error-prone. Indeed, whose does not require extensive well-annotated are becoming even more prominent. Therefore, it...
With the popularization of cloud computing, several enterprises and open-source communities have developed their own solutions. A number factors weigh on user selection, as each one has peculiar characteristics may target different usage scenarios. Considering such challenge, this paper focuses giving reader an understanding some major existing open computing solutions – XCP, Eucalyptus Open Nebula. Hopefully, a deep comparison can leverage research area providing good starting point to...
Textual cohesion is an essential aspect of a formally written text, related to linguistic mechanisms that connect elements such as words, sentences, and paragraphs. Several studies have proposed approaches estimate textual in essays automatically. There limited research aims study the extent which use machine learning can predict different languages (not just English). This paper reports on findings aimed propose evaluate automatically Portuguese English. The regression-based models grounded...
There is a global effort to address the school dropout phenomenon. The urgency act on it comes from harmful evidence that has societal and individual levels. Early Warning Systems (EWS) for at-risk student identification have been developed anticipate help schools better chance of acting it. However, several studies point doubt Correct EWS may come too late because they use only publicly available general information. We hypothesize having tool assess more subjective inter-relational factors...
Context: School dropout in distance learning has become a growing concern higher education. Private institutions exhibit 33.6% rate, while public show slightly lower rate at 31.2%, with an upward trend. Problem: Studies focus on categorical indicators of lack time, students' personal lives, the educational institution, and course instructors. However, research is still needed to explicitly identifying patterns related gender students abandoning courses. Solution: Identifying gender-related...
Electrocardiography devices are used to perform biomedicai signal acquisition from the cardiac electrical activity. Regulatory agencies, such as Food and Drug Administration (FDA) on USA National Agency for Sanitary Vigilance (ANVISA) in Brazil, classify medium risk Class 2 devices. Manufacturers must certify medical before commercialization according some requirements. Prescriptive standards clinical tests examples of these However, problems still common, can cause injuries or death...
A utilização de Learning Analytics (LA) traz consigo diferentes benefícios às instituições ensino. Porém, exige recursos computacionais e internet inacessíveis populações baixa renda, tornando esta uma tecnologia que pode gerar desigualdade. Nesse contexto, este artigo tem dois objetivos: (i) apresentar o conceito LA Desconectada, permite a aplicação dessa em ambientes com limitados; (ii) real para correção produção textual alunos escolas públicas brasileiras, compatível conceito. O...
Automated essay scoring (AES) is the task of automatically assigning scores (i.e., grades) to written texts. Although AES has been widely studied in literature (e.g., informational and argumentative essays), specific types texts still need more attention. Narrative essays are characterized by describing personal experiences stories, either real or fictional. In this work, we describe a study on student Portuguese under aspect Formal Register, which evaluates aspects related use Brazilian...
A produção textual de redações é uma etapa importante no processo ensino-aprendizagem, pois permite aos alunos expressarem suas ideias. coesão um critério fundamental nesse contexto. Apesar do interesse em abordagens automatizadas para avaliação redações, ainda existem poucos estudos que focam na escritas português Brasil. Este trabalho investiga três aprendizado máquina, comparando o uso classificação e regressão, estimar notas relacionadas à contexto ENEM. As investigadas utilizam a medida...
Electrocardiography (ECG) devices record the heart's electrical activity. These can be part of e-Health systems used to diagnose, treat, and monitor patients with cardiovascular diseases. Manufacturers must show regulatory agencies effectiveness during certification process. Nowadays, simulators are test calibrate ECG devices. Besides, manufacturers use formal methods specify device requirements increase dependability. In this context, it is necessary validate models provide confidence in...
A plataforma de acompanhamento personalizado da aprendizagem permite a digitalização, correção e diagnóstico pedagógico textos manuscritos, em língua portuguesa, produzidos por estudantes escolas públicas ou privadas. fim atender esse objetivo, foram desenvolvidos algoritmos Inteligência Artificial (IA) com técnicas visão computacional, para transcrição manuscritos; processamento linguagem natural, dos portuguesa. solução proposta pode auxiliar efetivamente os professores na textos,...
Left ventricular assist devices (LVADs) are mechanical pumps that help patients with chronic heart failure waiting for a transplant. Mathematical models of these can be used along cardiovascular system (CVS) to evaluate the assistance performance under different operating modes. The estimation CVS model parameters particular patient and numerical simulations allow implementation adequate LVAD operation mode. This work presents method estimate using only one hemodynamic variable: systemic...
Ventricular assist devices are mechanical blood pumps used to provide circulatory support in patients waiting for a heart transplantation. In many cases, when the lasts months it may be advantageous use pump with physiological control system automatically adjust output response changes cardiovascular (CVS). this paper, we present controller pulsatile ventricular device (PVAD) that controls ejection volume considering beat frequency. A mathematical model of CVS based on analog electric...
Coesão textual é uma propriedade fundamental da escrita formal, pois tem relação com a conexão harmoniosa dos elementos de um texto. Apesar diversos trabalhos analisarem automaticamente coesão em redações, ainda são escassos para o português. Este trabalho investiga modelos regressão estimar redações escritas português no contexto do ENEM, adotando conjunto 151 características identificadas na literatura. Experimentos usando base dados Essay-BR, composta por 4.570 estilo demonstram que...
This paper presents a 0D model for the pulsatile pediatric Ventricular Assist Device (pVAD), as well its characterization and test results obtained by using an experimental hydraulic system that provides operational conditions close to physiological observed in patients. The measurements of physical quantities used pVAD have been LabVIEW platform. air chamber pressure signal is pneumatic actuation behaviour, whereas pressure-volume relationship inside blood applied compliance. set validation...
This paper presents a case study on adopting custom design system (DS) in research and development project, where resistance from the team was encountered. To address this challenge, user-centric approach taken, treating as primary users of system. Through interviews with developers, their pain points were identified addressed, resulting refined process successful implementation. enhanced collaboration between UX teams, fostering sense ownership among developers. The highlights importance...