Semina最新文献 - Book学术

Recovering the Cathode Material Adhered to the Collector and Separator of Spent Lithium-Ion Batteries for Recycling Purposes 废锂离子电池收集器和分离器粘附正极材料的回收利用

Semina Pub Date : 2023-11-06 DOI: 10.5433/1679-0375.2023.v44.47835

Marcelo Henrique Novaes, Paulo Rogério Catarini Da Silva, Paulo Sergio Parreira, Gabriel Gonzaga Santos, Lucas Evangelista Sita, Jair Scarminio

引用次数: 0

Analysis of the Impact of the Pandemic on Social Inequalities in Enem 2019 and 2020 using Machine Learning 利用机器学习分析2019年和2020年疫情对社会不平等的影响

Semina Pub Date : 2023-11-06 DOI: 10.5433/1679-0375.2023.v44.48234

Bruno da Silva Macedo, Camila Martins Saporetti

{"title":"Analysis of the Impact of the Pandemic on Social Inequalities in Enem 2019 and 2020 using Machine Learning","authors":"Bruno da Silva Macedo, Camila Martins Saporetti","doi":"10.5433/1679-0375.2023.v44.48234","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.48234","url":null,"abstract":"ENEM measures the ability and knowledge of students who are in high school or have already completed it. With the scores obtained in the exam, the student can enroll in SISU, which is one way to enter public universities. During pandemic, the planning of schools, mainly public, was affected so that many students gave up taking the ENEM in 2020. To identify the profile of those enrolled in ENEM and verify which portion was most affected, this research analyze their social inequalities using data from ENEM 2019 and 2020 and machine learning methods. The methodology is based on cluster analysis where K-Means was applied and on performance classification where Random Forest, K-Nearest Neighbors, and MultiLayer Perceptron were used, and Select K-Best was used to select features. The results of the grouping generated two groups, one composed of subscribers with lower financial conditions and another with greater ones. In the classification, the MultiLayer Perceptron obtained an accuracy of 85.18% for 2019 and 83.63% for 2020. The results showed that the proposed methodology was able to identify the differences between the subscribers and classify their performance.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"48 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135724314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Machine Learning Model to Automatic Assessment of Gross Motor Development in Children using Posenet 用Posenet自动评估儿童大肌肉运动发展的机器学习模型

Semina Pub Date : 2023-10-10 DOI: 10.5433/1679-0375.2023.v44.48131

Edson Luiz Pilati Filho, Rodrigo Martins de Oliveira Spinosa, Jacques Duílio Brancher

{"title":"A Machine Learning Model to Automatic Assessment of Gross Motor Development in Children using Posenet","authors":"Edson Luiz Pilati Filho, Rodrigo Martins de Oliveira Spinosa, Jacques Duílio Brancher","doi":"10.5433/1679-0375.2023.v44.48131","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.48131","url":null,"abstract":"Gross motor skills such as sitting, jumping, and running are activities that involve the large muscles of the human body. The Test of Gross Motor Development, or TGMD, is widely used by researchers, pediatricians, physiotherapists, and educators from different countries to assess these skills in children aged 3 to 11 years. An important part of the test is that the movement, performed by the children, needs to be recorded and assessed by two or more professionals. The assessment process is laborious and takes time, and its automation is one of the main points to be developed. In recent years, methods have been proposed to automate the assessment according to the TGMD. The hypothesis investigated in this work is that it is possible to induce a machine learning model to identify whether the movement executed by the child is correct, considering only the first criterion of the TGMD-3 jumping skill. The skeleton of the children was extracted using PoseNet. A dataset of 350 images of Brazilian children between 3 and 11 years old performing the preparatory movement for the jump was used. The experimental results show an accuracy of 84%.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136361069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obsidians from the Archaeological Site of San Francisco Toxpan, Mexico: Supply Sources and Trade Routes 墨西哥旧金山Toxpan考古遗址的黑曜石:供应来源和贸易路线

Semina Pub Date : 2023-09-29 DOI: 10.5433/1679-0375.2023.v44.48250

Xcaret Gonzáles-Santos, María Dolores Tenorio, Melania Jimenez-Reyes, Roberto Octavio Molina-Vazquez

引用次数: 0

mulher na Gazeta Médica da Bahia: 《巴伊亚医学公报》上的一名妇女:

Semina Pub Date : 2023-09-21 DOI: 10.5335/srph.v22i2.14878

Davilene Souza Santos, Andréa da Rocha Rodrigues Pereira Barbosa

引用次数: 0

Análise do Douramento das Pinturas Decorativas da Berlinda de Aparato do Imperador D. Pedro II 佩德罗二世皇帝的贝琳达-德-阿帕拉托装饰画镀金分析

Semina Pub Date : 2023-09-19 DOI: 10.5433/1679-0375.2023.v44.47985

Raysa C. Nardes, Francis A. C. R. A. Sanches, Ramon S. Santos, Hamilton Gama Filho, Renato P. Freitas, Davi F. Oliveira, Joaquim T. Assis, Eliane M. Zanatta, Marcelino J. Anjos

{"title":"Análise do Douramento das Pinturas Decorativas da Berlinda de Aparato do Imperador D. Pedro II","authors":"Raysa C. Nardes, Francis A. C. R. A. Sanches, Ramon S. Santos, Hamilton Gama Filho, Renato P. Freitas, Davi F. Oliveira, Joaquim T. Assis, Eliane M. Zanatta, Marcelino J. Anjos","doi":"10.5433/1679-0375.2023.v44.47985","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47985","url":null,"abstract":"A Berlinda de Aparato do Imperador D. Pedro II é um objeto museológico muito importante para a história do Brasil. Trata-se do veículo imperial mais imponente de todo o período monárquico brasileiro, relacionado não apenas com a imagem do imperador D. Pedro II, mas com todo o Segundo Reinado. A berlinda foi encomendada para a cerimônia de coroação de D. Pedro II, em 1841 e pertence ao acervo do Museu Imperial, localizado na cidade de Petrópolis, Rio de Janeiro, Brasil. Neste trabalho foi analisado a técnica de douramento utilizada nas pinturas decorativas da berlinda. Para a análise do douramento foram aplicadas técnicas de Fluorescência de Raios X (XRF) e Macro Fluorescência de Raios X (MA-XRF). Todas as análises foram realizadas “in situ” utilizando equipamentos portáteis. As medidas de XRF realizadas sobre as folhas de ouro revelaram a presença do elemento-chave cromo. Os resultados combinados das técnicas analíticas utilizadas indicaram a possível utilização de mordente contendo amarelo de cromo como óleo adesivo para fixar as folhas de ouro nas pinturas decorativas. O resultado encontrado está de acordo com o descrito na literatura.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Intergranular Corrosion in 7050-T7451 Aluminum Structures Influenced by Temperature and Contact with Cutting Fluid 温度和切削液对7050-T7451铝组织晶间腐蚀影响的评价

Semina Pub Date : 2023-09-19 DOI: 10.5433/1679-0375.2023.v44.47981

Murillo de Moraes Valentim, Janaina Fracaro de Souza Gonçalves, Alisson Lemos dos Santos, Vinícius José Sichieri

{"title":"Evaluation of Intergranular Corrosion in 7050-T7451 Aluminum Structures Influenced by Temperature and Contact with Cutting Fluid","authors":"Murillo de Moraes Valentim, Janaina Fracaro de Souza Gonçalves, Alisson Lemos dos Santos, Vinícius José Sichieri","doi":"10.5433/1679-0375.2023.v44.47981","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47981","url":null,"abstract":"This research presents a practical approach to the development of the intergranular corrosion in 7050 - T7451 aluminum alloy used in the construction of manifold components of an aircraft structure. At first, it is presented what type of corrosion this is and how it develops in the crystalline structure, noting which variables contribute to the aggravation of this problem and their impacts on aviation, since this is the beginning of a number of structural defects included fatigue, which stands out even more because of the circumstances that are presented. The performance of the tests in laboratory seeks to evaluate the reactions of the material when exposed to cutting fluid and thermal variations for a long period; the development of corrosion in the microstructure has been simulated, and with this the loss of mechanical resistance of the samples could be evaluated. The results obtained indicate that the cutting fluid even slowly, showed effects in the propagation of corrosion in the alloy of aluminum studied and reduced your mechanical strength.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatores socioeconômicos associados à leptospirose no estado do Acre, Amazônia ocidental brasileira (2007-2020) 巴西亚马逊西部阿克里州与钩端螺旋体病相关的社会经济因素(2007-2020)

Semina Pub Date : 2023-09-15 DOI: 10.5433/1679-0367.2023v44n1p97

Mário Ribeiro Alves

{"title":"Fatores socioeconômicos associados à leptospirose no estado do Acre, Amazônia ocidental brasileira (2007-2020)","authors":"Mário Ribeiro Alves","doi":"10.5433/1679-0367.2023v44n1p97","DOIUrl":"https://doi.org/10.5433/1679-0367.2023v44n1p97","url":null,"abstract":"Introdução: doença provocada por infecção de origem bacteriana, a leptospirose é um dos agravos mais negligenciados no Brasil, estando associada a características socioeconômicas. Objetivo: analisar possíveis associações entre taxas de incidência da doença e fatores socioeconômicos no estado do Acre, a partir de análises espaciais. Material e Método: estudo ecológico com uso de dados secundários, sendo feita análise de autocorrelação espacial pelo Índice de Moran Local Bivariado, entre variáveis socioeconômicas e taxa média de incidência de leptospirose de todo o período de estudo. Adicionalmente, a análise espaço-temporal foi desenvolvida por meio de varredura cilíndrica estatística de Kulldorff, com raio de 70 quilômetros e distribuição de probabilidade de Poisson. Resultados: A maior quantidade de casos foi observada em homens, pardos e na faixa etária de 20 a 39 anos, em ambiente domiciliar e em pessoas com ensino fundamental 1 e 2 incompletos. Conclusão: A partir das análises estatísticas espaciais, destacaram-se municípios das partes norte e sul do estado. Ressalta-se que há possibilidade de subnotificação de casos, que poderia ser analisado a partir de estudos que coletem dados primários.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135487066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of pathogens and contamination indicators in fresh pork sausages in the state of São Paulo 圣保罗州新鲜猪肉香肠中病原体和污染指标的测定

Semina Pub Date : 2023-09-13 DOI: 10.5433/1679-0367.2023v44n1p89

Gabriela Terezinha Daniel, Alessandra Figueiredo de Castro Nassar, Aline Feola de Carvalho, Simone Miyashiro, Vanessa Castro, Sergio Santos de Azevedo, Eliana Scarcelli Pinheiro

{"title":"Determination of pathogens and contamination indicators in fresh pork sausages in the state of São Paulo","authors":"Gabriela Terezinha Daniel, Alessandra Figueiredo de Castro Nassar, Aline Feola de Carvalho, Simone Miyashiro, Vanessa Castro, Sergio Santos de Azevedo, Eliana Scarcelli Pinheiro","doi":"10.5433/1679-0367.2023v44n1p89","DOIUrl":"https://doi.org/10.5433/1679-0367.2023v44n1p89","url":null,"abstract":"The highest cost of beef and chicken meat justifies higher consumption of fresh sausage products, especially linguiça, due to their easy preparation and affordability for consumers, making necessary an evaluation of sanitary hygienic conditions of these products. The objective was to investigate the presence of pathogens such as Salmonella spp., coagulase-positive Staphylococcus, thermotolerant coliforms, Escherichia coli and Campylobacter spp. in artisanal and inspected fresh pork sausages. It was found that 12% (6/50) of the artisanal sausage samples were contaminated with Salmonella spp., 58% (29/50) presented coagulase-positive Staphylococcus levels above the acceptable limits for consumption and 76% (38/50) presented thermotolerant coliform levels above the acceptable limits. In sausage samples produced under inspected conditions, 6% (3/50) were contaminated with Salmonella spp., 24% (12/50) presented thermotolerant coliform levels above the acceptable limits, 2% (1/50) presented enteropathogenic E. coli. None samples showed coagulase-positive Staphylococcus counts above the limits, or presence of Campylobacter spp. Sensitizing traders and consumers about the importance of inspection service in food of animal origin is urgent for a sanitary acceptable production, since foodborne diseases continue to be a public health problem.","PeriodicalId":77620,"journal":{"name":"Semina","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135786906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Archaeological Ceramics from the Paranaense Museum Collection by EDXRF Technique 利用EDXRF技术分析帕拉纳塞博物馆收藏的考古陶瓷

Semina Pub Date : 2023-09-11 DOI: 10.5433/1679-0375.2023.v44.47994

Maria Sélia Blonski, Carlos Roberto Appoloni, Cláudia Inês Parellada

引用次数: 0