Navegando por Assunto "Desempenho"

Agora exibindo 1 - 18 de 18

Análise regional das diferenças nas notas do ENEM entre as escolas públicas e privadas no pós-pandemia
(2024-03-05) Costa, Jackson Antônio; Souza, Poema Isis Andrade de; http://lattes.cnpq.br/2017359154121135; http://lattes.cnpq.br/9376127966328375
The ENEM (National High School Exam), created in 1998, is the main means of access to higher education in Brazil, providing access to programs such as SISU (Unified Selection System), PROUNI (University for All Program) and FIES (Student Financing Fund). Therefore, this study aims to understand the factors that influence the ENEM scores of candidates, analyzing two databases (2019 and 2022) to examine the variations in scores in the period before and after the COVID-19 pandemic and, consequently, the disparities between the Southeast and Northeast regions of Brazil. At first, the Ordinary Least Squares (OLS) model was estimated with the proposition of analyzing the correlation of the scores obtained by the candidate with the school of origin, using socioeconomic variables as control variables. It is important to consider the bias of the school’s origin and the socioeconomic profile of the students, as students from private schools tend to have better grades. To mitigate this bias, the Propensity Score Matching (PSM) method was used, which is a valuable tool when the intention is to control selection biases. The results found reveal a discrepancy between the years 2019 and 2022, demonstrating an intensification of regional distortions in education, with better grade yields for students from private schools in the post-COVID-19 pandemic in the Southeast region.
Aplicação de métodos ágeis em desenvolvimento global de software
(2021-07-22) Alves, Annelyelthon Ferreira; Marinho, Marcelo Luiz Monteiro; http://lattes.cnpq.br/3362360567612060; http://lattes.cnpq.br/8410367808658970
Global Software Development (GSD) continues to grow and is rapidly becoming a standard, fundamentally different from local Software Engineering development. Withal, agile software development (ASD) has become an appealing choice for companies attempting to improve their performance although its methods were originally designed for small and individual teams. The current literature does not provide a cohesive picture of how the agile practices are taken into account in the distributed nature of software development: how to do it, who, and what works in practice. This study aims to highlight how ASD practices are applied in the context of GSD in order to develop a set of techniques that can be relevant in both research and practice. To answer the research question, ”how are agile practices adopted in agile global software development teams?” We conducted a systematic literature review and a survey with practitioners of the ASD and GSD literature. A synthesis of solutions found in seventysix studies provided 48 distinct practices that organizations can implement, including ”collaboration among teams”, ”agile architecture”, ”coaching”, ”system demo” and ”test automation”. These implementable practices go some way towards providing solutions to manage GSD teams, and thus to embrace agility.
Aprendizagem de máquina quântica e comitê quântico de classificadores
(2019-12-02) Araujo, Ismael Cesar da Silva; Nascimento, André Câmara Alves do; Silva, Adenilton José da; http://lattes.cnpq.br/0314035098884256; http://lattes.cnpq.br/0622594061462533; http://lattes.cnpq.br/7125338940009959
Quantum machine learning is a subarea of quantum computing that studies, among other things, the creation of equivalent classical classifiers. An ensemble of classifiers is a classification model in which the output is a combined result of the outputs of the classifiers contained in it. With the premiss that when using a sufficiently large ensemble with average classifiers, a good performance can still be obtained. This work investigates the differences in the performance of a quantum equivalent of an ensemble of classifiers, using trained and untrained classifiers. Where the simulation was mane, which the performance was measured through the calculation of the amplitude probabilities of the system. And the machine learning models of the ensemble were executed over benchmark datasets made available by scikitlearn library.
Avaliação econômica de sistemas de produção de ovinos de corte na região Nordeste
(2021-12-02) Gomes, Larissa Manoely da Silva; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/6299383338289793
The objective was to evaluate the economic viability of three sheep production objectives, differentiated by technological levels of exploration. Environmental and technical assumptions are assumed for the structuring of technological matrices. The Technological Matrix 1 considers a total of 176 animals, distributed in 100 hectares of native Caatinga pasture, with forage and mineral supplementation. For this system, nutritional, sanitary and reproductive management with more extensive characteristics is considered. For Technological Matrix 2, the initial module of 315 animals is assumed, at a moderate technological level, distributed in native Caatinga pasture enriched with Buffel grass (Cenchrus ciliaris) and rearing and finishing the lambs (as) on pasture in this cultivar. The Technological Matrix 3 has an initial herd of 598 animals, with lambs (as) finished in a confinement system, and allocation of the other categories of animals in Buffel grass pasture (Cenchrus ciliaris), considering more desirable zootechnical indices. The operational costs of technological matrices 1, 2 and 3 were calculated for the analysis of performance measures in determining a possible stable system. The technological matrix 1 obtained values of R$ 19.666,25, R$ 36.401,24 and R$ 37.654,79 for Effective Operating Cost (COE), Total Operating Cost (TOC) and Total Production Cost (CTP). In technological matrix 2, it found values of R$ 44.947,75 for COE, R$ 74.548,19 for COT and R$ 77.078,39 for CTP. In technological system 3, it obtained values of R$ 118.511,00 (COE), R$ 172.482,64 (COT) and R$ 176.152,84 (CTP). The values of fixed assets of the production systems were calculated, based on the cost of machinery and equipment, improvements and animals, estimating R$ 50.785,00 for technological matrix 1, R$ 151.385,00 of fixed assets for technological matrix 2 and R$ 250.840.00 for the technological matrix 3. Through the calculations obtained from the Gross Revenue (RB), Gross Margin (MB), Net Margin (ML), profitability and cost benefit ratio (BC), return evaluation values were observed and profitability in the production costs of technological matrix 2, representing R$ 170.563,39 for RB, R$ 52.052,39 for MB, R$ 1.919,25 for ML, R$ -5.589,45 for profitability and 0,97 for the index BC.
Contextualizando motivação e liderança: uma revisão bibliográfica
(2022-05-24) Mendonça, Yasminne Lays Lima de; Pinho, Marco Aurélio Benevides de; http://lattes.cnpq.br/2714666465429956
Dimensionamento do grupo moto-propulsor de um aeromodelo
(2024-02-19) Batista, Leonardo Henrique Tavares; Simões, Thiago Araujo; http://lattes.cnpq.br/7903824177570749; https://lattes.cnpq.br/1898774956397470
Aviation stands out as one of the essential pillars in modern society, offering individuals mobility, convenience, and comfort. In this aspect, aeromodels, representing the first step in the aviation journey, are the subject of study in this work. A crucial aspect in the construction of these aeromodels is the powerplant assembly, formed by the engine and the propeller. This study explores the process of determining the performance of this assembly for aircraft development. Using software such as Excel and Propeller Selector, data were obtained for the elaboration of aircraft performance analyses. These data, along with others provided by different aircraft areas, included coefficients of lift, drag, among other parameters. Through detailed calculations, a comprehensive analysis of the aircraft's performance was conducted in different flight phases, from takeoff to landing, always in compliance with FAR-Part 23 regulations. The motor selected for the project was the electric model D3542, while the chosen propeller had a diameter of 13 inches and a pitch of 7 inches. With these specifications defined, it was possible to evaluate the vehicle's performance to operate with a total weight of 12 kg. This analysis was essential to ensure efficient and safe flight operations, contributing to the continuous advancement of aviation and aerospace technology.
Efeito da adição de nucleotídeoss sobre o desempenho zootécnico no cultivo em sistema intensivo de Litopenaeus vannamei na fase de engorda
(2023-01-24) Silva, Eugênio Breno Lucena Amâncio Carmo da; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/6685497540018041
Efeito da adição do zooplâncton Brachionus plicatilis sobre o desempenho zootécnico de pós-larvas da espécie Litopenaeus vannamei cultivado em sistema de bioflocos
(2022-05-31) Xavier, Anderson Bruno Fernandes; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/3177743325406455
Efeito da frequência de adição do zooplâncton Brachionus plicatilis sobre o desempenho zootécnico de pós-larvas da espécie Litopenaeus vannamei cultivado em sistema de bioflocos
(2023-03-15) Malandra, Adely Leticia Alves; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/5263002170389598
Efeito da inclusão de farinha de minhoca com e sem zeólita natural na dieta de tilápia (Oreochromis niloticus) sobre os parâmetros de carcaça
(2022-10-07) Oliveira, Elton Francisco de; Ludke, Maria do Carmo Mohaupt Marques; http://lattes.cnpq.br/4629657233206289; http://lattes.cnpq.br/3930176884309812
The purpose of this research is to evaluate the effect of the addition of earthworm flour and the inclusion of zeolite (clinoptilolite) on carcass composition parameters. In the experiment, 280 tilapia of the species Oreocrhomis niloticus were used, with an initial and final weight of 2.826±0.0896g and 13.59±0.75g, respectively. The treatments were 8 diets corresponding to a 4 x 2 factorial arrangement, with 4 levels of inclusion of earthworm flour (0, 3.5; 7.0 and 10.5%) and levels of 0 and 2% of zeolite (Clinoptilolite ), the fish were distributed in a randomized block design with 5 replications. The following parameters were evaluated: carcass yield (RC), carcass dry matter (MSC); carcass organic matter (MOC); Mineral Substrate Matter (MMC); carcass energy based on dry matter (EMSC); ethereal substrate extract (EEC); energy retention coefficient (CRE); crude carcass protein (CBP); RE= Energy retention coefficient; CRP= Protein retention coefficient; TEP= Protein Efficiency Rate; IHE= Hepatosomatic Index; IVS= Viscerosomatic Index; At the end of the experiment (85 days) the animals were stunned with eugenol and then sacrificed and frozen, later they were lyophilized for analysis. The data were submitted to analysis of variance, in order to observe the main effects and the interaction between the factors (Worm meal levels and Zeolite inclusion) on the composition and protein and energy retention in the fish body. All analyzes were performed using the GLM procedure of the SAS computational package, at a 5.0% significance level. According to the data, there was a significant reduction in the amount of lipdis (p=0.0208) and in the energy retention coefficient (CRE) (p=0.0376) in the carcass of these animals when adding Zeolite in the diets. As for earthworm meal, a significant effect (p=0.0500) on CRE was observed, where when performing the regression there was a linear increase (P=0.0188) when including this ingredient in the diets of these fish. With this, we can add up to 10.5% of earthworm meal in diets for Tilapia, however Zeolite reduced energy efficiency, not interfering with other carcass
Efeitos do ajuste iônico em água de baixa salinidade sobre o desempenho zootécnico do camarão marinho Litopenaeus vannamei cultivado em sistema intensivo
(2023-03-24) Oliveira, Caio Vinícius Nunes de; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/6521603417943771
Estudo de viabilidade de sistemas de detecção de armamentos em tempo real em linhas de ônibus urbanos
(2021-12-09) Lima Junior, Cícero Pereira de; Silva, Douglas Véras e; http://lattes.cnpq.br/2969243668455081; http://lattes.cnpq.br/9901763283774954
Surveillance systems are fundamental on preventing armed robberys on public busses. However, to be operated in real-time theses systems demand an unrealistic amount of people. The usage of computer vision and deep learning technics raises as a way to automate parts or even the whole surveillance process, from the weapons detection to the alarm triggering. For this process to be accomplished efficiently, allowing authorities to take more effective actions, the system needs to be able to handle a growing security cameras demand. Thus, this work analyses a bus line weapon detection system viabillity. Through simulation, this work evaluated the perfomance of YOLO algorithm, in its fourth version, on a client-server model under a growing security camera demand. The server is composed of a Tesla V80 GPU with a 12GB memory, Intel Xeon dual core processor, 61GB RAM memory and 200GB disk space. Finally, from the gathered results, its observable that the application presents a detection time increase after having introduced 16 virtual users (cameras), also the average response time cannot be considered as real-time, on bus security context.
O impacto do estilo de liderança no desempenho da equipe de gestão na Secretaria de Administração
(2019) Pereira, Amanda Malena dos Santos; Barros, Daniel Lins; http://lattes.cnpq.br/6562483652898862; http://lattes.cnpq.br/0693160514160011
This research was carried out in the administrative department (SAD) in the sector of the Cadastre Management of Suppliers, Materials and Services of the State (GECAD) and Cadastro Suppliers (CADFOR). The objective was to analyze what the leader observes in his leadership behavior; to verify how the manager exercises the leadership and to identify the styles used from the perception of the leader and those led. The methodology used was of the explicative and descriptive type with quantitative approach. The work sought to outline the profile of the leader, in which he sought the vision ofthe leaders in relation to the manager and identify the style used by him the maturity of the leaders. It was analyzed that the style of leadership used varies according to the situation. And in some moments the task is more used and in others the relationship, as situational leadership suggests. This result showed that the manager is flexible in the way he handles his employees, adapting his style in accordance with the work environment, and varying his behavior according to the maturity and the ability to perform tasks and relationships on the part of the servers.
Influência da adubação com lodo do tratamento de esgoto doméstico no cultivo de feijão e milho
(2021-03-01) Lyra, Gabriel Rigaud Figueirôa; Silva, Robson José; http://lattes.cnpq.br/7515677435963888; http://lattes.cnpq.br/3958782513733383
In the biological stage of sewage treatment, part of the organic matter degraded by microorganisms is converted into biomass, which constitutes the biological sludge or secondary sludge. Currently, the most used alternative for final disposal of sludge in Brazil is sending it to landfill, due to the low operational cost involved. However, this technique does not include the nutritive and/or energetic potential of the sludge. That said, this study evaluated the use of sludge from domestic sewage treatment in the cultivation of cowpea bean seedlings (Vigna unguiculata (L.) Walp., Cultivar IPA 206) and corn (BRS Gorotuba), compared to the use of chemical fertilizers. The experimente for each culture was conducted in a greenhouse and set up in a completely randomized, with 4 treatments and 3 repetitions, using pots containing 10 kg of soil. The two cultivations were carried out in parallel. The 4 treatments applied were: without fertilization, chemical fertilizer (NPK), lime sludge and composted sludge (T0, T1, T2 and T3, respectively). Among the performance parameters analyzed, in both crops, T1, T2 and T3 treatments presented plants with equivalent physical aspects (plant height and stem diameter). With regard to beans, the treatment T3 stood out for the amount of pods per plant, being about 125% higher than others, and for the higher performance in the weight of 100 beans (29.67g). For corn, treatments T1, T2 and T3 achieved equivalent performance. However, T3 obtained the highest numerical averages in all parameters of this cultivation. Finally, it was observed that the treatment with the greatest influence, in both crops, was T3, reaffirming the great potential of composted sludge
Mentalidade fixa e mentalidade de crescimento: desafios do aprendizado escolar
(2024-12-10) Matias, Débora Tomé da Silva; Vicente, Renata Barbosa; http://lattes.cnpq.br/2541553913706614
Este estudo investiga a importância e o impacto da mentalidade do aluno no processo de aprendizagem, analisando como as crenças que os estudantes possuem em relação às suas habilidades — e ao desenvolvimento dessas habilidades — influenciam seu desempenho escolar. Adota-se uma abordagem fundamentada em uma revisão bibliográfica da literatura existente sobre a teoria de Carol Dweck, bem como outros estudos relevantes nas áreas de educação, psicologia e aprendizagem. A análise da literatura indica que alunos com mentalidade de crescimento acreditam que suas habilidades podem ser desenvolvidas com esforço e prática, o que se reflete em maior motivação e persistência diante dos desafios. Em contrapartida, alunos com mentalidade fixa tendem a não acreditar no desenvolvimento de suas capacidades e, como resultado, demonstram maior propensão à desistência diante de obstáculos. Com base nas evidências levantadas, o estudo conclui que é fundamental que os professores promovam a mentalidade de crescimento em sala de aula, utilizando estratégias pedagógicas que incentivem o esforço, a prática e o aprendizado a partir da experiência do erro. O estudo também sugere a realização de futuras investigações empíricas sobre a aplicação da mentalidade de crescimento em diferentes contextos educacionais, por meio de entrevistas e intervenções práticas em sala de aula.
Redes ópticas de acesso: uma análise comparativa entre EPON e SuperPON
(2024-12-12) Silva, Marcos Antonio da; Araújo, Danilo Ricardo Barbosa de; http://lattes.cnpq.br/2708354422178489
The demand for high transmission rates for Internet services has been increasing over time, resulting in a large flow of data. This project focuses on access networks, which provide quality intemet services to homes and small business. Optical fiber offers high transmission rates, both for upstream and downstream, capable of transporting several Gbps, depending on the network architecture and equipment used, such as the OLT (Optical Line Terminal). Passive optical networks are access networks that use interconnected optical fibers in a star topology and point-to-multipoint configuration, consisting only of passive optical components between the Optical Line Terminal (OLT) and the Optical Network Unit (ONU). As a technological evolution strategy, they can be used to leverage the installed base of copper cables and coaxial cables in the access network, serving as feeder cables for technologies such as Digital Subscriber Line (DSL), cable modem, and Local Multipoint Distribution System (LMDS), and, in the future, to provide optical fiber to user premises. This project aims to show the difference between EPON and SuperPON technologies, both of which are passive network technologies, and to verify the cost-effectiveness of both. In this work, we explore the particularities of both technologies, considering the size of the network. We observe that EPON (Ethernet Passive Optical Network) stands out for its significantly lower cost compared to SuperPON when expanding the network to smaller areas. This is due to the lower need for expenses with CO (Central Office) and equipment. On the other hand, SuperPON presents a cost advantage when expanding to larger areas, as it requires less CO. Therefore, it becomes a more advantageous option compared to EPON in such network expansion scenarios. Another comparison we will address is the number of ONUs (Optical Network Unit) that we can obtain compared to EPON and SuperPON. In EPON, one fiber can support up to 64 ONUs in a network with a 1:8 splitter, resulting in 8 CTOs (Optical Termination Boxes). In a network with a 1:16 splitter, we can have 4 CTOs. On the other hand, in the SuperPON network, we can accommodate up to 1024 ONUS on a single fiber with a 1:8 splitter, resulting in 128 CTOs. With a 1:16 splitter, we can have 64 CTOs.
Salinização da água e seus efeitos sobre o desempenho zootécnico do camarão marinho Penaeus vannamei na fase de berçário
(2023-01-24) Cavalcanti, Bruno Roberto de Siqueira; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/4106106458669767
Uso de técnicas de detecção de comunidades para análise de redes ópticas
(2021-12-09) Barros, Jonas Freire de Alcântara Marques de; Araújo, Danilo Ricardo Barbosa de; http://lattes.cnpq.br/2708354422178489; http://lattes.cnpq.br/6917406943428049
The growth in the use of services on the Internet has promoted a increasing demand for high transmission rates. This demand have been met by optical networks. At the design stage of these networks, the engineer must be able to assess the performance of a given network before its actual physical implementation. In this design process, several topologies are considered. The comparison between topologies is made through metrics that indicate a certain aspect of the network. Typically the metrics considered are performance indicators, such as Throughput, Blocking Probability, Resilience and also other indicators, such as the network Cost. Performance indicators are important because they inform about the quality of a particular topology. Therefore, performance metrics are essential for the design projects of such networks. The most reliable way to calculate the values of these performance indicators is through simulations. However, simulations have a high computational cost, increasing the time needed to obtain information about topologies; since, in these projects, a very large number of different topologies must be considered. On the other hand, a large number of researches in the most diverse domains of knowledge have been carried out on the theme of community detection in graphs. However, there are no applications of these techniques in high capacity fiber-optic networks. Thus, the present work aims to investigate the existence of a correlation between the ability of a fiber-optic network to form communities and its performance indicators. More specifically, it’s Blocking Probability and indicators of Resilience. The analysis was performed comparing the Blocking Probability and Resilience of these networks and the clustering metrics using scatter plots. According to the results, there is a positive correlation between the community metrics and the network performance indicators, and comparatively a speedup of approximately 4,500 times was obtained between the community metrics and the simulations.