Dissertations/Thesis

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2021
Dissertations
1
  • JULIANA DA SILVA LEAL
  • Product Space Study in the State of Alagoas

  • Advisor : EVANDRO DE BARROS COSTA
  • COMMITTEE MEMBERS :
  • EVANDRO DE BARROS COSTA
  • MARCUS DE MELO BRAGA
  • FRANCISCO JOSE PEIXOTO ROSARIO
  • BALDOINO FONSECA DOS SANTOS NETO
  • Data: Jan 13, 2021


  • Show Abstract
  • The objective of this study is twofold: First, it aims at analyzing and interpreting Brazilian products exportation from 1997 to 2019. Second, it seeks to reduce the scope to the Alagoas state – one of the nation’s poorest states – to identify possible exportation growth opportunities. Thereby, the study was conducted by using the model Product Space, which can show us, through a network, if it is possible to industries produce new products from those already produced by them. After analyzing the Product Space, we concluded that Alagoas is not isolated in the network. Alagoas can grow its network by exporting more than 50 products, such as motor vehicles, chemical wood pulp, and passenger cars. Such growth can promote new public and private partnerships. Thus, new industries might be attracted and boost Alagoas economic growth.

2
  • MARCELO DE OLIVEIRA SOUZA
  • Modeling of Anchors Zones for dissemination of floating content in vehicular networks using Temporal Centrality Metrics

  • Advisor : ANDRE LUIZ LINS DE AQUINO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • MAURICIO JOSE DA SILVA
  • RAQUEL DA SILVA CABRAL
  • RIAN GABRIEL SANTOS PINHEIRO
  • Data: Jan 29, 2021


  • Show Abstract
  • Vehicle networks have great capacity for the production and dissemination of content, however, the constant topological changes make it difficult to exchange information be- tween nodes and can invalidate the information, generating information losses, packet delays, improper disconnections, among other problems. In vehicular networks there are places where the content generated by the sensor nodes reaches a larger audience, these places which we call Anchorage Zones are used for exchanging relevant information with greater connectivity. The information disseminated in an anchor zone is known as Float- ing Content because it has local, temporal and spatial validity. We developed a study using metrics of complex networks such as, Betweenness and Degree together with flow measures, applied to data from real bases and simulation with the proposal to determine the best zones for exchanging information in a vehicular network. The results show that the methodology used is effective for characterizing anchor zones in vehicular networks, because the information extracted with the discretized time is better approximated to re- ality, eliminating edges that no longer exist between the nodes of the network, differently from the aggregate time that stores information for edges that no longer exist.

3
  • ISRAEL LOUREIRO CAVALCANTE VASCONCELOS
  • Multivariate Modeling to handle Urban Air Pollution Data observed trough Vehicular Sensor Networks

  • Advisor : ANDRE LUIZ LINS DE AQUINO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • RAQUEL DA SILVA CABRAL
  • EDLER LINS DE ALBUQUERQUE
  • Data: Jan 29, 2021


  • Show Abstract
  • This work presents an interdisciplinary assessment that looks in-depth the tracking of air quality in urban environments. This kind of application is well suited to be approached with the paradigm of wireless sensor networks in their overall variations. Therefore a robust and diverse set of solutions have been developed following the technology capabilities advance.
    The proposed experiment takes advantage of Vehicle Sensor Networks (VSN) by embedding sensor nodes to public transportation, addressing this study case with bus lines within such a way that the mobiles spread the sampling activity through a large number of different places visited during the route. Simultaneously, it alleviates restrictions of power management, packaging dimensions (size and weight), and overall maintenance issues. We perform environmental modeling based on real data considering a temporal and spatial multivariate behavior on observed phenomena. We define the city of São Paulo as reference for the case study and parsed the asserted data to create a multivariate map of samples, showing the behavior of five different air pollutants (CO, O3, PM10, NO2 and SO2) simultaneously while it also varies in time.
    The current development stage covers a set of handling processes over an input data that has unformatted or missing information due to being sourced from real sensors and the creation of the map mentioned above.
    Our methodology addresses
    1) the mentioned environmental simulation,
    2) deploying mobile sensor nodes and perform sensing process,
    3) implement network activity and delivery of collected data,
    4) predict a view of a monitored environment based on gathered data with the same strategy previously applied to create the initial field.
    Finally, we plan to evaluate system-level performance and operational constraints through an event-based simulation, taking into account a detailed description of roads, bus lines, vehicle itineraries, and overall traffic information.

4
  • ELTON RAFAEL CASTRO SILVA MATOS
  • The Effect of Probiotics on the Intestinal Microbiota of Obese Patients: Systematic Review and Meta-Analysis

  • Advisor : JORGE ARTUR PECANHA DE MIRANDA COELHO
  • COMMITTEE MEMBERS :
  • FERNANDO GOMES DE BARROS COSTA
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • MANOEL ALVARO DE FREITAS LINS NETO
  • Data: Apr 23, 2021


  • Show Abstract
  • Background: Obesity is a major public health concern worldwide. Studies suggest that gut microbiota has several functions related to host health. Administration of probiotic may affect the gut microbiota. This systematic review aims to evaluate the effects of oral supplementation with probiotics on the intestinal microbiota in obese people.

    Methods: Our systematic review aimed to evaluate the results of Randomized Clinical Trials (RCTs) on intestinal microbial changes in obese people after the administration of probiotic supplements. We searched five literature databases (EMBASE, MEDLINE, ISI - Web of Science, Scopus and CENTRAL). The protocol this study was registered in PROSPERO (International prospective Register of Systematic Reviews).

    Results: 2.425 records were identified during the literature search. After the review of the titles and abstracts, 29 publications were selected for a review of the full texts, of which only 9 met the selection criteria and three were includede to meta-analisys. 2 studies showed no significant difference in the bacterial phylum. 6 studies showed only significant changes in some genus. The comparison of studies shows the existence of changes in the intestinal microbiota of obese people after the use of probiotics.

    Conclusions: The findings suggest that oral supplementation with probiotics may offer beneficial changes on gut microbiota. Based on the evidence in this review, some specific strains of probiotics alter the intestinal microbiota in obese individuals. However, some studies have reported that there have been no significant changes on gut microbiota diversity in obese people. It suggests that further studies are needed to determine the size effect of probiotic therapy.

     
5
  • GUILHERME PEIXOTO DE SOUZA
  • Optimization of driver assignment in medical clinics at Detran-AL.

  • Advisor : RIAN GABRIEL SANTOS PINHEIRO
  • COMMITTEE MEMBERS :
  • LUIZ SATORU OCHI
  • ANDRE LUIZ LINS DE AQUINO
  • RIAN GABRIEL SANTOS PINHEIRO
  • Data: Apr 27, 2021


  • Show Abstract
  • ..

6
  • ANTONIO CARLOS DE LIMA FILHO
  • AN EVOLUTIONARY SYSTEM TO FOLLOW UP THE SELF DIAGNOSIS OF KYPHOSIS AND LORDOSIS

  • Advisor : EVANDRO DE BARROS COSTA
  • COMMITTEE MEMBERS :
  • EVANDRO DE BARROS COSTA
  • FABIO PARAGUACU DUARTE DA COSTA
  • LEANDRO DIAS DA SILVA
  • ROBERTA VILHENA VIEIRA LOPES
  • Data: Jun 21, 2021


  • Show Abstract
  • This work proposes the implementation of a variation of Holland's genetic algorithm, to follow the evolution of a patient's posture through the analysis of exams performed by the patient himself with the help of a mobile device. The purpose of this system is to assist the patient in identifying the presence of changes in the spine called kyphosis and lordosis, at which time the patient will need to seek medical help. Therefore, the system should receive information about the limits of the spine angles considered normal, acceptable and critical for kyphosis and lordosis. Then, the system will request monthly self-diagnosis, generated from a profile photo of the patient taken by a mobile device, from which a set of information is extracted, which are recorded in a database, for analyzed by a genetic algorithm. The genetic algorithm generates several possibilities of evolution for the patient's column based on the information recorded in the database, if this information leads the genetic algorithm to find a situation considered critical for the patient in the coming months, the system will display a message on the screen cell phone informing the patient of the need to see a doctor to evaluate his spine. To validate the implementation of the referred system, simulations with images generated with photoshop were made. The results obtained with these simulations demonstrate the system's ability to anticipate changes in the patient's posture in advance that can lead to kyphosis or lordosis.

7
  • VICTOR LEMOS TENORIO
  • Fecal Microbiota of Patients with Type 2 Diabetes Mellitus After Use of Probiotics: A Systematic Review and Meta-analysis

  • Advisor : JORGE ARTUR PECANHA DE MIRANDA COELHO
  • COMMITTEE MEMBERS :
  • ELIANA SILVA DE ALMEIDA
  • FRANCISCA ROSALINE LEITE MOTA
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • Data: Jun 25, 2021


  • Show Abstract
  • The incidence of diabetes mellitus has risen sharply and its prevalence poses a major threat to global health. The human gut microbiota refers to microbes that colonize the gut and participate in various functions that benefit the host. Studies suggest that probiotics can be administered in alterations of the diabetic microbiome to restore the composition of the intestinal microflora. This systematic review aims to assess the effectiveness of ad- ministering probiotics in people with type 2 diabetes mellitus. Methods: Systematic review was conducted with the aim of evaluating the results of Randomized Clinical Trials (RCTs) on intestinal microbial changes in people with type 2 diabetes mellitus after administration of probiotics. Five literature databases were considered (EMBASE, MEDLINE, ISI - Web of Science, Scopus and CENTRAL). The protocol that delimits this work was registered in PROS- PERO (International Prospective Register of Systematic Reviews). Results: 973 records were identified during the literature search. After reviewing the titles and abstracts, 58 publications were selected for the complete reading of the texts, of which only 4 met the selection criteria and were included for meta-analysis. The methodological quality analysis classified 2 studies as "high risk of bias", 1 as "some concerns" and 1 as "low risk of bias". The 4 studies showed changes in some genera of bacteria after intervention with probiotics. Conclusions: The results obtained from this systematic review and meta-analysis suggest that the effect of probiotic supplements on the intestinal microbiota of diabetic patients has been inconclusive and that a larger quantity of Randomized Clinical Trials is needed to expand the number of participants, with a longer time interval and to provide detailed information on the diversity of the gut microbiota to fully assess the size of the effect of this therapy in the treatment of type 2 diabetes mellitus.

8
  • LUCAS MONTEIRO FREIRE
  • The effect of endurance exercise on the gut microbiota - A

    systematic review

  • Advisor : JORGE ARTUR PECANHA DE MIRANDA COELHO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • BRAULIO CESAR DE ALCANTARA MENDONCA
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • MANOEL ALVARO DE FREITAS LINS NETO
  • Data: Sep 24, 2021


  • Show Abstract
  • Context: Endurance exercise is defined as that performed for a
    long period and at moderate intensities, and can be performed
    in different modalities. Studies suggest that the intestinal
    microbiota has several functions related to the health of the
    host. The practice of Endurance exercises can alter the
    intestinal microbiota. This systematic review aims to verify the
    effects of endurance exercises on the intestinal microbiota.
    Methods: A systematic review was conducted with the aim of
    evaluating the results of Randomized Clinical Trials (RCTs) and
    Non-Randomized Clinical Trials (NECR's) on intestinal microbial
    alterations in endurance exercise practitioners. Five literature
    databases were considered (EMBASE, MEDLINE, ISI - Web of
    Science, Scopus and CENTRAL). The protocol that delimits this
    work was registered in PROSPERO (International Prospective
    Register of Systematic Reviews).
    Results: 1965 records were identified during the bibliographic
    search. After reviewing the titles and abstracts, 27 publications
    were selected for the complete reading of the texts, of which
    only four met the selection criteria. No study failed to
    demonstrate a significant difference in the bacterial phylum, with
    some caveats. Four studies showed only significant changes in
    only a few genders. The comparison of studies demonstrates
    the existence of alterations in the intestinal microbiota of people
    who practice endurance exercises.
    Conclusions: The results of this review suggest that endurance
    exercise has the potential to offer beneficial changes in the gut
    microbiota. Based on the evidence from this review, some
    samples of the selected works had alterations in the intestinal
    microbiota. However, some studies reported that there were no 

    significant changes in the diversity of the gut microbiota of
    individuals engaged in endurance exercise. This situation
    suggests that further studies are needed to determine the size of
    the effect of endurance exercise.

9
  • FABRICIO DOMINGOS FERREIRA DA ROCHA
  • Gamification and Open Learner Models: An experimental study on self-regulated learning 

  • Advisor : DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • COMMITTEE MEMBERS :
  • ALAN PEDRO DA SILVA
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • ELAINE HARADA TEIXEIRA DE OLIVEIRA
  • IG IBERT BITTENCOURT SANTANA PINTO
  • Data: Nov 3, 2021


  • Show Abstract
  • The search for increasingly efficient learning in online environments has encouraged the growing development of research. Learning is often perceived as a tedious activity, which intensifies the very high dropout rates. In recent years, several methods have been applied in order to keep the student engaged in the learning environment in such a way as to transform the tedious activity into a pleasurable and fun one. Computer games allow students to experience ways of learning that demonstrate immersion in a practice, supported by structures that lead to professional experiences and skills, thus, games are seen as a tool that facilitates and supports student learning. In this sense, Gamification uses game elements in non-game environments, with the aim of promoting student engagement, transforming the tedious activity into a pleasurable one. Although several works show positive results with the use of gamification, it is common not to get the student to awaken independence in the learning process. Self-regulation of learning is characterized as the student's ability to act in their learning environment, reflecting and making decisions about which path would be more convenient for better learning. In this way, the student acts in an active and constructive way in the process, in which they establish goals that will guide their learning. In this sense, the OLM (Open Learning Model) enables the opening of the student model, and thus, the student will be able to view information related to the learning process itself, allowing active participation in the learning process, being able to make decisions about which are the paths that generate more results for him in the online environment. Thus, the present work aimed to verify, through a controlled experiment, whether the use of gamification in an online environment with an open model would bring significant results in self-regulation and student learning. For this, two open model environments were compared, one with and the other without gamification, in which students (schools, institutes and public universities) would have to answer 15 questions in an application developed for android, the first 10 being common to all and the other 5 questions customized by them, regarding the level and content of the questions, and at this stage the student would have the version with or without gamification, randomly distributed after accessing the application. The results showed that there was no significant difference between versions with and without gamification, both with regard to self-regulation and learning.

10
  • MATEUS LINS DOS SANTOS
  • Knowledge-based model for medical decision support in choosing biometric formulas and intraocular lenses for cataract

  • Advisor : AYDANO PAMPONET MACHADO
  • COMMITTEE MEMBERS :
  • AYDANO PAMPONET MACHADO
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • FREDERICO AUGUSTO DE SOUZA PEREIRA
  • JOÃO MARCELO DE ALMEIDA GUSMÃO LYRA
  • Data: Nov 19, 2021


  • Show Abstract
  • Cataract is the leading cause of blindness in the world, despite being reversible with simple surgical treatment. In recent years, efforts have been made so that cataract surgery, in addition to treating blindness, would also correct pre-existing refractive defects through the choice of intraocular lenses with adequate convergence power. The choice of the power of the new lens is made through biometric formulas that have been developed over the last 50 years. Despite showing good results, there is room for improvement, especially in patients with atypical eyes. In this study, multiple computational models were developed in order to assist the ophthalmologist in preoperative decision-making, through predictive algorithms that assess whether the patient will likely obtain a good result with a given lens and biometric formula.

11
  • BRUNNO DAVISSON MELO CAVALCANTE
  • A CONCEPTUAL FRAMEWORK FOR SOLIDARY EDUCATIONAL DIGITAL GAMES

  • Advisor : ARTURO HERNANDEZ DOMINGUEZ
  • COMMITTEE MEMBERS :
  • EDILSON FERNEDA
  • ARTURO HERNANDEZ DOMINGUEZ
  • FABIO PARAGUACU DUARTE DA COSTA
  • LEANDRO DIAS DA SILVA
  • Data: Nov 26, 2021


  • Show Abstract
  • With the development of high violence games, such as: Mortal Combat, Carmageddon, Doom, GTA (Grand Theft Auto), these games are banned in Brazil and in several countries around the world due to their high violence, games in this category pass on the teaching of that to be successful in the game it is necessary to practice unethical attitudes such as: lack of respect, injustices, theft, lack of solidarity, illegal attitudes; emerges as an alternative the Solidary Educational Digital Games (JDES) which aim to place the player in environmental scenarios, catastrophes, having a chance to perform ethical or unethical attitudes being rewarded or punished according to their attitudes. For the development of solidary educational digital games, it is essential not to always start the creation from scratch, beginning, it is essential to use software reuse techniques. This work presents a Conceptual Framework whose purpose is to streamline and cheapen the development of JDES. The Conceptual Framework was divided into two stages, the first was developed through UML modeling (Unified Modeling Language) the Framework Digital Games Educational Solidarity (FJDES) and Auxiliary Classes that were used to create the Solidary Educational Digital Game Flood, in the second step was developed through Agile Modeling and Scrum Method the Scrum Framework Educational Solidarity Digital Games (FSJDES), where the Framework Educational Solidarity Digital Games and Auxiliary Classes already developed in the first step was reused for the creation of the Digital Educational Solidarity Game Earthquake, both games were implemented in Java. As a result, there was a three-month reduction in the development of Solidary Educational Digital Games, where the production of the first game took four months and the second game took a month.

12
  • LUAN GOMES DA SILVA
  • The study of the impact of transparency in the authorship of pedagogical recommendations on the perception of online students

  • Advisor : RANILSON OSCAR ARAUJO PAIVA
  • COMMITTEE MEMBERS :
  • RANILSON OSCAR ARAUJO PAIVA
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • LEONARDO BRANDAO MARQUES
  • GEISER CHALCO CHALLCO
  • Data: Nov 30, 2021


  • Show Abstract
  • The present work has as main objective to analyze what determines the student's confidence in the recommendations of online courses. The analysis will feature a systematic literature review to identify the articles that best define the relationship between trust and acceptance of pedagogical recommendations. The review will define the impact that recommendations have on user confidence, whether automatic, manual or the consistency of what was recommended. In addition, we will carry out an experiment with simulated data to measure students' perception of confidence in the recommendations suggested in the online environment in order to identify whether students prefer recommendations from a teacher or a machine, also measuring the transparency of the process choice as to whether or not to know who the recommendation comes from. We hope to contribute to the understanding of the dynamics of student confidence in online environments, as well as provide theoretical and empirical foundations for the improvement of pedagogical recommendations in distance learning environments.

13
  • ALANA VIANA BORGES DA SILVA NEO
  • Analysis of students' confidence in online learning environments in items offered by recommendation systems, in relation to the coherence of the explanation that justifies the recommended item
  • Advisor : RANILSON OSCAR ARAUJO PAIVA
  • COMMITTEE MEMBERS :
  • RANILSON OSCAR ARAUJO PAIVA
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • LEONARDO BRANDAO MARQUES
  • RAFAEL FERREIRA LEITE DE MELLO
  • Data: Nov 30, 2021


  • Show Abstract
  • Online learning environments were developed as an online way for students to interact with their teachers, colleagues and course content. These environments have pedagogical resources in quantity and diversity, allowing recommendations from these to students, based on their respective needs, in addition to the skills that should be developed. However, there are limitations in these recommendation systems in online learning environments, especially in relation to the quality of the recommendations, leading to problems regarding the acceptance of the recommendations by the students. One of the factors that can lead to non-acceptance of the recommendations received is the lack of confidence. A possible approach to this problem is to explain to students how this recommendation was created. For this, we intend to identify if there is a difference in relation to the students' confidence in the recommendations: (1) when the recommendation has an explanation coherent with the problem faced by the student; (2) When the recommendation has an explanation not consistent with the problem faced by the student and; (3) When the recommendation is not explained. To evaluate our proposal, we will use simulated data from student interactions in an online course to generate recommendations based on the interactions and needs of the students (simulated). Then, we will create the explanations for the recommendations created and evaluate, using a questionnaire, the effect of the explanation's coherence on the students' confidence in relation to the pedagogical recommendations. We hope with this proposal to contribute to an improvement in the quality of the recommendations and to increase students' confidence in relation to the pedagogical recommendations in online learning environments.

14
  • ALEXANDRE JOSE BARROS MACHADO
  • COMBINING THE USE OF ARTIFICIAL AND HUMAN INTELLIGENCE TO RECOMMEND MISSIONS IN GAMIFIED INTELLIGENT TUTORING SYSTEMS

  • Advisor : DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • COMMITTEE MEMBERS :
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • RANILSON OSCAR ARAUJO PAIVA
  • ALAN PEDRO DA SILVA
  • RAFAEL FERREIRA LEITE DE MELLO
  • Data: Nov 30, 2021


  • Show Abstract
  • The use of Information and Communication Technologies is increasingly evident in educational environments. Online educational platforms can help students and teachers in the formative complexity of teaching and learning in different areas of knowledge. Among the e-learning platforms, the Intelligent Tutoring Systems - ITS allow an adaptive educational environment supported by automated resources of recommendations, carried out by artificial intelligence techniques, aiming at students' learning according to their user profiles. ITS revolutionizes how this information interacts with students and teachers by taking traditional teaching from the classroom to personalized online educational environments. Many researchers develop gamification techniques to increase motivation and avoid the adverse effects (boredom) of using these ITS. However, many issues may be considered to understand the effectiveness of teaching/learning in gamified STI environments; one of them is the active participation of the teacher in the authoring of the knowledge domain to be worked on in the gamified STI, as well as in the pedagogical monitoring students, in a simplified way. In this sense, researchers have become increasingly interested in providing teachers with strategies to monitor and adapt gamification design in the context of STIs to utilize teachers' inherently human capabilities to adjust gamification design according to student performance.  This study will compare the results of using recommendations through missions in a simulated scenario of a gamified environment, automated by the STI, with and without the teacher's intervention, analyzing the data generated by the platform and suggesting missions according to the observations of the monitoring data. For comparison purposes, this dissertation will propose the evaluation of three simulated environments, where teachers will analyze one of three monitoring scenarios of an educational platform (manual, automated, and semi-automated). Each of the scenarios will be used in a randomized experiment, where participating teachers will assess through a form what is their perception of cognitive effort and time dedicated to creating recommendations for missions and monitoring students on the platform.

15
  • SUZANA CINTHIA SILVA OLIVEIRA
  • Adaptation of a Protocol to Hearing Loss Early Assessment: metanalisys of early intervention and cultural validation from the Success From The Start 

  • Advisor : LEONARDO BRANDAO MARQUES
  • COMMITTEE MEMBERS :
  • LEONARDO BRANDAO MARQUES
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • FELIPE VENÂNCIO
  • ALINE ROBERTA ACEITUNO DA COSTA
  • Data: Dec 8, 2021


  • Show Abstract
  • Early identification contributes to language development and other developmental milestones in children with hearing loss. After diagnosis, parents end up having to make several decisions regarding the treatment of their children. In the Brazilian literature, no instrument was found available to provide support for parents' decision process. To address this gap, this work aims to translate and culturally adapt a monitoring screening protocol for parents and professionals that targets children with hearing loss. For this, two studies were conducted. The first consisted of a systematic review of the literature and meta-analysis on the influence of the intervention on the oral language development of children with hearing loss. Fifteen studies were part of the qualitative synthesis and twelve of the quantitative synthesis. According to the summarized data, the age of identification and early intervention allowed children to achieve near-normal speech and language outcomes, both of which can be obtained by growth curves using standardized language scores. The second study consisted of the cultural adaptation and adaptation of 452 items of the Success from the Star protocol, corresponding to all principal areas of language development: communication, listening, listening, and vocalization. Judges evaluated 25% of the items on the following categories: 1) cultural suitability, 2) conceptual clarity, and 3) suitability to the target audience. We proposed a back-translation to consolidate the final items. Subsequently, the translated items were compared with the revised version of the instrument, which comprises 347 items in the two areas of development. A committee of experts qualitatively evaluated the instrument to validate its content. In addition to committee valuation, we conclude with some directions to effectiveness validation through its use by parents and professionals.

     

2020
Dissertations
1
  • YURI SILVA TOLEDO BRANDAO
  • AVALIAÇÃO CLÍNICA E QUALIDADE DE VIDA NAS HIPERPLASIAS PROSTÁTICAS BENIGNAS 

  • Advisor : JORGE ARTUR PECANHA DE MIRANDA COELHO
  • COMMITTEE MEMBERS :
  • AYDANO PAMPONET MACHADO
  • MANOEL ALVARO DE FREITAS LINS NETO
  • DIVANISE SURUAGY CORREIA
  • Data: Jan 23, 2020


  • Show Abstract
  • A maioria dos homens desenvolverá hiperplasia prostática benigna em torno dos 80 anos de idade, com aumento importante na incidência a partir de 50 anos, sendo uma doença muito comum na população dessas faixas etárias. As implicações clínicas decorrentes da doença consistem em sintomas do trato urinário inferior (STUI) tipicamente obstrutivos. Este quadro compromete a qualidade de vida do paciente com HPB. O tratamento definitivo dessa afecção urológica dá-se por meio da ressecção transuretral da próstata (RTUp), sendo esta o padrão-ouro. O presente estudo realizou uma análise retrospectiva de pacientes diagnosticados com HPB entre 2015 e 2017 e que foram submetidos à RTUp bipolar com o objetivo de avaliar o incremento clínico aferido pelo IPSS (escore internacional de sintomas prostáticos) e qualidade de vida (QoL) pré e pós-operatórios, assim como utilizou o peso prostático para predizer o sucesso da cirurgia através da estatística bayesiana. Foi observado que pacientes com grandes hiperplasias (peso prostático >= 60g) foram os que mais se beneficiaram da RTUp, com efeito clínico muito forte.

2
  • KAMILLA KEMILLY TENÓRIO ALVES DOS SANTOS
  • Gamification Analytics Model for Teachers

  • Advisor : DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • COMMITTEE MEMBERS :
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • RANILSON OSCAR ARAUJO PAIVA
  • ALAN PEDRO DA SILVA
  • SEIJI ISOTANI
  • Data: May 22, 2020


  • Show Abstract
  • Devido aos avanços tecnológicos, várias atividades humanas se transformaram, inclusive na área educacional. Novas abordagens surgiram com o objetivo de promover o uso da tecnologia na educação. Uma dessas abordagens é o e-learning. E-learning envolve a utilização de tecnologias da informação e comunicação para melhorar e ajudar o ensino e a aprendizagem. Devido as recentes pesquisas que apoiam a efetividade de sistemas e-learning, acadêmicos e profissionais estão cada vez mais dando atenção a esse abordagem. Contudo, estado de tédio que levam estudantes a desmotivação é muito persistente nesses sistemas e para lidar com esse problema, gamificação esta sendo aplicada para manter estudantes engajados e motivados durante o processo de aprendizagem. Contudo, e-learning gamificados no estado da arte não monitoram o impacto da gamificação durante o processo de aprendizagem e também não suportam a adaptação do design de gamificação durante a instrução quando a performance dos alunos não está como o esperado, nem de forma automática e nem por humanos. Considerando que alguns estudos reportaram um impacto negativo com o uso da gamificação em sistemas e-learning e que uma das possíveis causas é a falta de adaptação do design da gamificação, uma forma de evitar esses resultados negativos é monitorar e adaptar o design da gamificação quando o design atual não está sendo efetivo para conquistar os objetivos desejados. Portanto, o objetivo desta dissertação é desenvolver uma solução que possibilite professores monitorarem e adaptarem o design de gamificação em e-learning gamificados com o objetivo de manter os estudantes engajados durante todo o processo de aprendizagem e aumentar a percepção positiva dos professores em relação aos efeitos da gamificação. A solução apresentada será implementada e complementará uma ferramenta de autoria que permite a criação e customização por professores de ambientes educacionais gamificados já existente. Consequentemente, a nova versão da ferramenta de autoria permitirá professores monitorarem a efetividade da gamificação e adaptar o cenário gamificado durante o processo de aprendizagem, quando julgarem necessário. Após a expansão das funcionalidades da ferramenta de autoria, objetiva-se avaliar a solução e apresentar as vantagens, desvantagens, limitações e possíveis trabalhos futuros. 

3
  • GISELDO DA SILVA NEO
  • Construção de Chatbots AIML com a ajuda de uma ferramenta de modelagem visual baseada na linguagem BPMN

  • Advisor : EVANDRO DE BARROS COSTA
  • COMMITTEE MEMBERS :
  • EVANDRO DE BARROS COSTA
  • ARTURO HERNANDEZ DOMINGUEZ
  • PATRICK HENRIQUE DA SILVA BRITO
  • THALES MIRANDA DE ALMEIDA VIEIRA
  • Data: Jul 14, 2020


  • Show Abstract
  • Um chatbot é um programa de computador capaz de manter um diálogo com um ser humano. Entre as diversas técnicas existentes para a construção de chatbots existe uma especificação aberta baseado em XML chamada Artificial Intelligence Markup Language (AIML). Desenhar fluxos de diálogos para os chatbots é um processo que depende da tecnologia escolhida para a construção do chatbot, mas construir fluxos de diálogo com AIML não é uma atividade intuitiva devido ao uso intenso de tags XML, pois um avançado conhecimento nessas tags é necessário para a construção dos fluxos de diálogo. Uma modelagem visual para a construção dos fluxos em AIML seria o necessário para que estes fluxos sejam construídos com rapidez e velocidade por não programadores. Existe uma notação visual utilizada no mapeamento de processos de negócio, o Business Process Model And Notation (BPMN), que dispõe de uma especificação de seus componentes visuais. É possível especificar o fluxo do diálogo de um chatbot utilizando uma ferramenta visual que suporta a notação BPMN e transformar este fluxo em AIML de forma automatizada, conforme demonstrado nessa dissertação. Para confirmar esta hipótese foi construído um conversor de fluxos de diálogos especificados em BPMN para AIML, chamado BPMN2AIML. Para avaliá-lo foram mapeados em BPMN alguns scripts de diálogo, em seguida os diagramas com os fluxos foram convertidos em AIML utilizando o BPMN2AIML, esse arquivo gerado foi carregado em um chatbot, chamado ARI. O desempenho e utilidade do conversor foram avaliados por usuários que atuaram como botmasters, desenhando a base de conhecimento em BPMN, e consideraram a experiência satisfatória e útil.

4
  • WANDERSON RUBIAN MARTINS RODRIGUES
  • Uma Abordagem Humano Computacional para Identificação dos Fatores que influenciam o IDEB na Rede de Ensino Básico na Visão dos Gestores Educacionais

  • Advisor : EVANDRO DE BARROS COSTA
  • COMMITTEE MEMBERS :
  • EVANDRO DE BARROS COSTA
  • MARCUS DE MELO BRAGA
  • BRUNO ALMEIDA PIMENTEL
  • JOAO CARLOS CORDEIRO BARBIRATO
  • OLIVAL DE GUSMAO FREITAS JUNIOR
  • Data: Jul 15, 2020


  • Show Abstract
  • A busca pela alocação efetiva dos recursos a fim de alcançar o maior número de pessoas é o desafio constante do gestor público. Desta forma, o presente trabalho tem como objetivo identificar quais fatores, percebido pelos gestores educacionais, impacta no IDEB das escolas municipais de Maceió-Alagoas. Os dados iniciais trabalhados nesta pesquisa já existem, porém precisam ser analisados frente à realidade cotidiana do âmbito escolar, estabelecendo uma relação entre a percepção dos gestores e os resultados divulgados pelo INEP/MEC. Assim, surge a pergunta central que norteia esse estudo:  comointegrar a visão computacional (máquina) com a visão dos gestores educacionais (humanos) para identificar os fatores que possam influenciar positivamente a melhoria do IDEB, visando apoiar a tomada de decisão dos gestores educacionais? Para tanto, utilizou-se dados do teste SAEB das escolas públicas de Maceió. A presente pesquisa tem caráter descritivo e o desenvolvimento metodológico da investigação advém da revisão da literatura, da análise e compilação dos dados do rendimento dos alunos dos anos iniciais do ensino fundamental da rede de ensino municipal de Maceió-Alagoas no IDEB do ano de 2015, e da realização de entrevistas com os diretores escolares, visando compreender as impressões da gestão escolar sobre os resultados do IDEB, conduzindo um estudo experimental, obtendo resultados na tarefa de identificação dos atributos relevantes, como os extraídos pela visão computacional principalmente nas dimensões: violência na escola; políticas, ações e programas na escola; gestão escolar e recursos financeiros.

5
  • DANIEL GOMES DE MELLO FARIAS
  • Avaliação de Técnicas de Inteligência Artificial para Predição e Classificação de Séries Temporais

  • Advisor : ANDRE LUIZ LINS DE AQUINO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • FABIANE DA SILVA QUEIROZ
  • Data: Jul 17, 2020


  • Show Abstract
  • Este trabalho tem por objetivo avaliar o impacto das técnicas de aprendizagem profunda (Long Short Term Memory e Convolutional Neural Network) para predição e classificação de séries temporais, em duas aplicações específicas. Uma para classificar o sinal de eletroencefalograma, e outro, na predição da radiação solar. Foram utilizadas várias ferramentas nas diversas etapas de pré processamento, extração de características e classificação/predição. Os modelos desenvolvidos foram comparados com a literatura utilizando métricas como: acurácia e root mean square error (RMSE), obtendo resultados significativos. Na predição da radiação o RMSE foi de 78 W/m2 enquanto que para a classificação do sinal cerebral, a acurácia do modelo chegou até 86%.

6
  • MARIO ANDRE DE MENEZES COSTA
  • Transfer Learning with Deep Learning for Text Classification Using Genetic Algorithms

     

  • Advisor : ANDRE LUIZ LINS DE AQUINO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • BRUNO COSTA E SILVA NOGUEIRA
  • ELIANA SILVA DE ALMEIDA
  • Data: Aug 13, 2020


  • Show Abstract
  • Modelos de linguagem pré-treinados vêm ganhando notoriedade e resultados promissores. Inicialmente existiam duas grandes limitações nessa abordagem, a primeira é que o treinamento de modelos existentes demandava grande quantidade de recursos computacionais, o que podia inviabilizar sua utilização, e a segunda seriam os modelos multilíngues, que fatidicamente tinham baixo desempenho em linguagens de baixo recurso justamente pela sua alta generalidade. Esses dois pontos focais foram mitigados com a utilização de multi modelos com técnicas de ajuste fino em datasets para idiomas específicos. Contudo, ainda existem processos manuais na seleção de alguns hiperparâmetros e por isso propomos uma abordagem genética, a fim de alcançar a solução de forma mais automatizada e prática para pesquisadores e professionais da área. Para tal, foram avaliados dois conjuntos de dados para classificação, alcançando resultados equivalentes ou superiores aos encontrados em trabalhos anteriores que utilizam uma abordagem de seleção manual de parte dos hiper-parâmetros.

7
  • CRISTOPHER GABRIEL DE SOUSA FREITAS
  • An information-theoretic approach of network structure and dynamics

  • Advisor : ANDRE LUIZ LINS DE AQUINO
  • COMMITTEE MEMBERS :
  • ANDRE LUIZ LINS DE AQUINO
  • FABIANE DA SILVA QUEIROZ
  • RIAN GABRIEL SANTOS PINHEIRO
  • Data: Oct 26, 2020


  • Show Abstract
  • Modern networks are facing the most challenges in recent years. Life is changing, and the Internet became one of the essential services such as power, healthcare, banking. The Internet has opened global information, and nowadays, a stable and efficient network is a global right and requirement. Legacy networks inherited many concepts and infras- tructure from circuit-switching networks, with inflexible design relying most on hardware. Another critical aspect of networking is debugging it, which requires specialized personnel with properly designed software. For these reasons – and currently increasing demand – Internet Service Providers are dealing with challenges that require innovation and sci- entific strategies. This scenario led to new paradigms such as software-defined networks (SDNs) to address most of the current issues by bringing the network logic from hard- ware design to software development and virtualization. The emergence of SDNs has drawn the attention of network scientists and engineers to new roads. The Internet is the most extensive distributed system, and it relies upon distributed devices communicat- ing efficiently through protocols. SDNs allow a protocol-agnostic, centralized view, and flexible control of the network, favoring the development of new strategies that are not achievable into legacy IP networks. A computer network is a sophisticated collection of network devices and end-systems. In this work, we study two main aspects of computer networks: structure and dynamics. By understanding the network characteristics and modeling its dynamical processes, we can uncover how network structure and dynamics affect its robustness. To achieve this understanding, we propose the usage of information- theory quantifiers for network characterization. For network topology, we introduce the Fisher Information Measure for quantifying the network characteristics, using alongside the Network Entropy in a bi-dimensional representation that allows us to identify if a network is closer to a randomsmall-world or scale-free topology. We evaluated the traf- fic time-series using the Normalized Permutation Entropy and the Statistical Complexity for network traffic. We observe the traffic generation models based on heavy-tail distri- butions can not reproduce the actual traffic dynamics. We believe this understanding through information-theory quantifiers can help develop fault-management solutions and network automation. Instead of focusing on the massive amount of data available for networks, we can observe how the quantifiers describe the network behavior. Considering the current trend of the SDN paradigm that allows applications to have a centralized view of the network state and easily reconfigure its policies. Several studies are attempting to design a global model that predicts the behavior of networks.

8
  • LUANA THAYSE BARROS DE LIMA
  • MODEL FOR INTERPRETATION OF BRAIN IMPACT IN SYSTEMIC LUPUS ERYTHEMATOSUS PATIENTS BASED ON BRAIN MAGNETIC RESONANCE
  • Advisor : THIAGO SOTERO FRAGOSO
  • COMMITTEE MEMBERS :
  • THIAGO SOTERO FRAGOSO
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • MICHELLE JACINTHA CAVALCANTE OLIVEIRA
  • VALFRIDO LEAO DE MELO NETO
  • Data: Oct 27, 2020


  • Show Abstract
  • Systemic Lupus Erythematosus (SLE) is a chronic, autoimmune, multisystemic inflammatory disease, whose changes in the central nervous system (CNS) can be assessed by Magnetic Resonance Imaging (MRI). The aim of this study is to propose a model of brain MRI interpretation based on correlations between neuroimaging changes and clinical and laboratory data. Brain MRI of 44 patients were analised in this cross-sectional study, considering the variables: brain atrophy, white matter hiperintense lesion (WMHI), arterial stenoses, lacunar infarcts and micro-bleeds. Proton Spectroscopy and Diffusion Tension Imaging (DTI) were also performed, with Fractional Anisotropy (FA) and Medium Diffusion (MD) analysis. Among the clinical variables disease time, disease activity index (SLEDAI) and cumulative organic damage (SLICC) were considered, as well as the presence of SLE criteria by the American College of Rheumatology (ACR). Data analysis verified normal distribution, followed by Pearson's Correlation, T-Test and Chi-square. The sample included 43 women and one man, with an average age of 34.4 ± 11.3; mean illness time of 51 months ± 42.3; SLEDAI average 3.37 ± 3.6, SLICC average 0.37 ± 0.54. Mild brain atrophy was identified in 40.9% of patients, while WMHI was present in 65.9%. There were stenoses and micro-bleeding in 13.6% of the sample and in 15.9% lacunar infarcts were identified. Average NAA / Creatine ratio of 1.94 ± 0.15, Mio / Creatine ratio of 0.20 ± 0.04. The changes in FA and MD were associated with age, disease duration and global brain atrophy score. There was an association between ACR criteria and changes in FA and MD. Correlation of increased WMHI with age and with the presence of arterial stenosis was evidenced. The average time of illness, SLEDAI and SLICC were reduced, inferring that the sample was mostly in the period of remission of the disease. MRI findings were similar to the literature when WMHI, atrophy, stenosis, microsleeds and lacunas infarcts were evaluated. Microstructural changes associated with ACR criteria for SLE were evidenced. In contrast, we found no statistically significant correlation between FA and MD with SLEDAI and SLICC. In view of the subtlety and importance of MRI findings, a model of brain MRI interpretation in SLE patients is recommended.

9
  • WALDNIS ESPIRITO SANTO DA SILVA
  •  

    A CARACTERIZAÇÃO MOLECULAR DO MICROBIOMA GASTROINTESTINAL DE PESSOAS AUTISTAS E NEUROTÍPICOS: UMA REVISÃO SISTEMÁTICA

  • Advisor : ELIANA SILVA DE ALMEIDA
  • COMMITTEE MEMBERS :
  • ELIANA SILVA DE ALMEIDA
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • FRANCISCA ROSALINE LEITE MOTA
  • Data: Dec 11, 2020


  • Show Abstract
  •  

     O Transtorno do Espectro do Autismo é uma síndrome do neurodesenvolvimento, caracterizado por padrões de comportamentos repetitivos e dificuldade na interação social, que afeta sobremaneira o desenvolvimento da pessoa diagnosticada com TEA. Agregado a esses sintomas de desordens comportamentais, estudos anteriores indicam uma elevada prevalência distúrbios gastrointestinais.O percentual de indivíduos que lidam com a disbiose – desequilíbrio da Microbiota intestinal – varia de acordo com o estudo, todavia há relatos de altos índices de disfunção gastrointestinal em Autistas, que apresentam sintomas do tipo: dor abdominal, constipação, diarreia, alternância entre diarreia e constipação, chegando até a uma inflamação gastrointestinal. Na atualidade, os estudos que vêm obtendo relevante destaque relacionam-se à Microbiota gastrointestinal. De acordo com Turnbaugh, Peter J. et al, os maiores conjuntos de dados relatados de comunidades bacterianas que residem no corpo humano estão no intestino. O Microbioma gastrointestinal é muito complexo e, portanto, difícil de ser estudado usando métodos microbiológicos convencionais, como os métodos de cultura. Portanto, será utilizada a tecnologia computacional para estudar a comunidade microbiana gastrointestinal nas fezes de portadores do Transtorno do Espectro do Autismo e seus irmãos neurotípicos. Desse modo, este trabalho buscou identificar, através da Revisão Sistemática e da Metanálise de ensaios clínicos, a existência de alterações do Microbioma gastrointestinal entre pessoas com Transtorno do Espectro do Autismo e neurotípicos, obtendo resultados promissores para fins de transplante de microbiota intestinal. 

2019
Dissertations
1
  • MARLON LUCIO SILVA DOS SANTOS
  • O uso de inteligência artificial para auxílio no cálculo da lente intraocular.

  • Advisor : AYDANO PAMPONET MACHADO
  • COMMITTEE MEMBERS :
  • AYDANO PAMPONET MACHADO
  • EDILEUZA VIRGINIO LEÃO
  • JORGE ARTUR PECANHA DE MIRANDA COELHO
  • JOÃO MARCELO DE ALMEIDA GUSMÃO LYRA
  • Data: Dec 18, 2019


  • Show Abstract
  • A catarata é uma doença ocular que se trata de qualquer opacificação do cristalino que atrapalhe a entrada de luz nos olhos, ou seja, há a perda de transparência do cristalino, acarretando na diminuição da visão. Segundo a Organização Mundial de Saúde (OMS), a catarata é responsável por cerca de 47,8% dos casos de cegueira no mundo, acometendo principalmente a população idosa. A deficiência visual causada pela catarata pode ser revertida com o tratamento cirúrgico, o qual consiste na remoção da lente natural opaca e colocação de uma lente artificial, chamada de lente intraocular. Apesar da cirurgia de catarata ser o procedimento cirúrgico mais realizado na oftalmologia e uma das que mais evoluiu nas últimas décadas, trata-se de um procedimento microscópico de alta complexidade, muito seguro, porém, como qualquer procedimento invasivo, tem os seus riscos associados. A tecnologia atual e a experiência do cirurgião reduzem significativamente esse risco. A evolução conseguida foi tamanha que a cirurgia deixou de ser somente reparativa para ser também refrativa, ou seja, tendo também o objetivo de corrigir o erro refrativo (grau) da paciente. Nesse contexto, uma das questões mais críticas é a escolha da lente ideal para o paciente, pois caso ocorra algum equívoco nessa etapa, pode culminar em uma insatisfação por parte do paciente, no caso se ainda precisar corrigir muito o grau pelo uso de óculos ou até mesmo, em casos mais graves, a necessidade de uma outra cirurgia para que a satisfação seja conseguida. Por se tratar de um procedimento delicado e custoso, a escolha da lente se trata de um tomada de decisão sensível e importante, pois deve-se levar em conta que é uma situação muito complicada para o paciente se submeter a tal procedimento e vir a ter complicações pós cirurgia devido à dificuldade de qualquer reparo posterior no local afetado. Para auxiliar o profissional no momento da escolha da lente adequada, esse estudo propõe a construção de um modelo preditivo que irá sugerir o modelo de lente de mais adequado para cada paciente. O objeto do estudo terá como base um banco de dados contendo aproximadamente cinco mil pacientes que foram submetidos ao procedimento cirúrgico da catarata. Essa base foi construída a partir da coleta de dados dos prontuários pré e pós cirúrgicos de todos os pacientes disponíveis. A base será submetida à uma análise estatística para justificar e confirmar a significância de cada atributo presente na base, viabilizando assim uma seleção de variáveis que serão utilizados como entrada para os algoritmos de aprendizagem. O resultado esperado dessa metodologia consiste em uma modelagem computacional que proporcione a concepção de um modelo preditivo que tenha a capacidade de propor um modelo de lente o mais adequado possível, fazendo com que se eleve a assertividade e a satisfação dos resultados dos procedimentos cirúrgicos praticados atualmente.

2
  • RANDERSON DOUGLAS RIBEIRO DOS SANTOS
  • A ANÁLISE DE RECOMENDAÇÕES EXPLICADAS DE RECURSOS EDUCACIONAIS PARA APOIAR O ENSINO E A APRENDIZAGEM EM UM SISTEMA TUTOR INTELIGENTE.

  • Advisor : RANILSON OSCAR ARAUJO PAIVA
  • COMMITTEE MEMBERS :
  • RANILSON OSCAR ARAUJO PAIVA
  • DIEGO DERMEVAL MEDEIROS DA CUNHA MATOS
  • IG IBERT BITTENCOURT SANTANA PINTO
  • ALAN PEDRO DA SILVA
  • Data: Dec 18, 2019


  • Show Abstract
  • Com o avanço das Tecnologias da Informação e Comunicação (TICs) e da Educação a Distância (EaD), os ambientes online de aprendizagem adquiriram uma posição de destaque como ferramentas potencializadoras do processo de aprendizagem. E Dentro deste contexto, pode-ser ver que os Sistemas Tutores Inteligentes (STI) vem ganhando uma grande popularidade pelo fato de tornar o processo de aprendizagem mais dinâmico, tornando o conteúdo adaptável para cada aluno, trazendo um ensino individualizado, dentre outros fatores. Mas, como esses ambientes disponibilizam muitos recursos para os usuários, isso tem causado uma confusão na construção do aprendizado, pois ainda que esses ambientes forneçam algumas recomendações visando auxiliar os usuários a fazerem boas escolhas, a falta de explicação tem gerado uma certa desconfiança, não tornando o processo transparente, e isso têm sido um problema em IA, pois previsões/recomendações são feitas, mas não vem acompanhadas de explicações. Ou seja, mesmo com as recomendações, muitos usuários não conseguem progredir, pelo fato de não confiarem no que foi sugerido/recomendado e não entenderem o motivo de tal recomendação, achando que aquilo não se aplica a seu perfil ou sua necessidade e simplesmente rejeitam a recomendação. Desse modo, este trabalho tem por objetivo investigar o efeito das recomendações explicadas na aderência (aceitação) em STI, onde para isso, foi projetado um sistema de aprendizagem e nele foi disponibilizado um curso de estatística descritiva que utilizou dois tipos de recomendações, sendo elas: com explicações detalhadas, e outra sem explicações. Sendo assim, foi realizada a coleta, análise dos dados e foi montado um modelo de regressão logística para a representatividade dos dados, assim como também foi utilizada uma abordagem qualitativa pelo fato de priorizar os resultados numéricos do presente estudo afim de avaliar os comportamentos e opiniões dos usuários do sistema. Mediante a realização do experimento, viu-se que, assim como em outros ambientes a explicação também trouxe bons resultados nas recomendações de recursos educacionais, onde houve uma maior aceitação por parte do usuário, quando ele passou a entender o motivo de tal recomendação, podendo julgar se aquilo de fato é relevante ou não.

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