Pub Date : 2023-11-10DOI: 10.5747/ce.2023.v15.e401
Beatriz Marques Carvalho, Gabriel da Cruz Dias, Luz Marina Andrade Maruoka, Rosane Freire Boina, Deuber Lincon da Silva Agostini
Since wastewater treatment is of great interest to society, it is important to develop techniques that perform this treatment by removing pollutants such as dyes, pesticides, and metals. In this context, adsorption stands out as a promising method in the treatment of effluents, allied to this, as polymeric membranes considerably improve the ability to remove pollutants. Carbon-based additives, such as graphene oxide, have been used in the area of adsorption because they are an adsorbent capable of removing metallic ions and dyes. Thus, it is interesting to carry out studies of the polystyrene polymer with graphene oxide, aiming at the production of adsorbent membranes. To this end, the production of polystyrene was first analyzed, with graphene oxide added to the polymer matrix in the future. Thus, polystyrene microfibers were produced using the electrospinning technique and analyzed morphologically using optical microscopy and scanning electron microscopy (SEM). With the help of ImageJ and OriginPro 8.5 software, a histogram of the frequency distribution of microfiber diameters and the normal curve was created. Through the results obtained, it was observed that there was the production of microfibers with considerable morphology, as fibers with beads and agglomerates were not observed.. From the histogram, it was noted that the microfibers had an average diameter of 5.73 µm.
{"title":"CARACTERIZAÇÃO MORFOLÓGICA DE MICROFIBRAS ELETROFIADAS DE POLIESTIRENO","authors":"Beatriz Marques Carvalho, Gabriel da Cruz Dias, Luz Marina Andrade Maruoka, Rosane Freire Boina, Deuber Lincon da Silva Agostini","doi":"10.5747/ce.2023.v15.e401","DOIUrl":"https://doi.org/10.5747/ce.2023.v15.e401","url":null,"abstract":"Since wastewater treatment is of great interest to society, it is important to develop techniques that perform this treatment by removing pollutants such as dyes, pesticides, and metals. In this context, adsorption stands out as a promising method in the treatment of effluents, allied to this, as polymeric membranes considerably improve the ability to remove pollutants. Carbon-based additives, such as graphene oxide, have been used in the area of adsorption because they are an adsorbent capable of removing metallic ions and dyes. Thus, it is interesting to carry out studies of the polystyrene polymer with graphene oxide, aiming at the production of adsorbent membranes. To this end, the production of polystyrene was first analyzed, with graphene oxide added to the polymer matrix in the future. Thus, polystyrene microfibers were produced using the electrospinning technique and analyzed morphologically using optical microscopy and scanning electron microscopy (SEM). With the help of ImageJ and OriginPro 8.5 software, a histogram of the frequency distribution of microfiber diameters and the normal curve was created. Through the results obtained, it was observed that there was the production of microfibers with considerable morphology, as fibers with beads and agglomerates were not observed.. From the histogram, it was noted that the microfibers had an average diameter of 5.73 µm.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":" 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135190954","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}
Pub Date : 2023-09-27DOI: 10.5747/ce.2023.v15.e400
George Miguel Farha Diban, Barbara Stolte Bezerra, Maria Lígia Chuerubim
Obtaining terrain elevation data is essential for numerous engineering applications. However, regardless of the technique used to obtain the elevation data, there will be errors intrinsic to the instruments and to the measurement technique used, as well as depending on the model of Earth representation, which are plane, spherical or ellipsoidal. In this perspective, this work proposes a comparative approach between the elevation data obtained from the geodesic coordinates, provided by Global Navigation Satellite System (GNSS), and those obtained from Google Earth (GE) and Shuttle Radar Topography Mission (SRTM). The data collection was carried out in the urban section between km 125 to km 145,500 of Dom Pedro-I Highway (SP-065), State of São Paulo, Brazil. The quality of the results is evaluated based on the Mean Quadratic Error (RMSE). The main results showed that the elevation data obtained through the SRTM show greater agreement or adjustment to the GNSS data when compared to the higher quality and less variation than those obtained through the GE, since they have smaller RMSE and are closer to the average elevations calculated for the highway segment analyzed. However, it is worth noting that the use of GE can be a good alternative for low-cost preliminary studies.
{"title":"AVALIAÇÃO COMPARATIVA DA QUALIDADE DOS DADOS DE ELEVAÇÃO OBTIDOS COM GNSS, GOOGLE EARTH E SRTM PARA PROJETOS DE ESTRADAS","authors":"George Miguel Farha Diban, Barbara Stolte Bezerra, Maria Lígia Chuerubim","doi":"10.5747/ce.2023.v15.e400","DOIUrl":"https://doi.org/10.5747/ce.2023.v15.e400","url":null,"abstract":"Obtaining terrain elevation data is essential for numerous engineering applications. However, regardless of the technique used to obtain the elevation data, there will be errors intrinsic to the instruments and to the measurement technique used, as well as depending on the model of Earth representation, which are plane, spherical or ellipsoidal. In this perspective, this work proposes a comparative approach between the elevation data obtained from the geodesic coordinates, provided by Global Navigation Satellite System (GNSS), and those obtained from Google Earth (GE) and Shuttle Radar Topography Mission (SRTM). The data collection was carried out in the urban section between km 125 to km 145,500 of Dom Pedro-I Highway (SP-065), State of São Paulo, Brazil. The quality of the results is evaluated based on the Mean Quadratic Error (RMSE). The main results showed that the elevation data obtained through the SRTM show greater agreement or adjustment to the GNSS data when compared to the higher quality and less variation than those obtained through the GE, since they have smaller RMSE and are closer to the average elevations calculated for the highway segment analyzed. However, it is worth noting that the use of GE can be a good alternative for low-cost preliminary studies.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536270","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}
Pub Date : 2023-01-06DOI: 10.5747/ce.2022.v14.e398
Letícia Aparecida Costa Magro, Rita de Cássia Lima Mazzuchelli, Marcelo Rodrigo Alves
Ecological systems are fundamental to the principles of biodiversity, nutrient cycling, ecological ecosystems and reproduction of dynamics. The objective of the work was used with microbiological parameters to evaluate the quality of agroforestry systems in implantation ages, and to compare them with occupied areas with pastures without management (same use) and native forests, in a total of 5 areas, located in Pontal do paranapanema. The methodology consisted of a bibliographic survey, collections and soil examinations. For each of the selected areas, a grid with 5 random points was defined for collecting soil samples at a depth of 0-10 cm. The offers made were: Dehydrogenase enzymatic activity; Phosphatase activity; ß-glycosidase; Arylsulfatase activity; and FDA. as collected from companies contracted for Unoeste's soil laboratory. The data obtained in the experiments were selected for statistical analysis. As enzymes were shown to change phosphatase and were not significant between treatments, the phosphatase changes observed in the FDA analyzes and the glycoside survey were altered.
生态系统是生物多样性、营养循环、生态系统和繁殖动力学原理的基础。本研究的目的是利用微生物学参数来评价种植期农林业系统的质量，并将其与位于Pontal do paranapanema的5个地区的未管理牧场(相同用途)和原始森林的占用区进行比较。方法包括书目调查、收集和土壤检查。对于每个选定的区域，定义了一个随机5个点的网格，用于收集0-10 cm深度的土壤样品。出价是:脱氢酶酶活性;磷酸酶活动;ß糖苷酶;Arylsulfatase活动;和食品及药物管理局。这些数据来自与联合国环境规划署土壤实验室签约的公司。选取实验所得数据进行统计分析。由于酶被证明会改变磷酸酶，并且在治疗之间没有显著性，因此在FDA分析和糖苷调查中观察到的磷酸酶变化被改变。
{"title":"ATIVIDADE ENZIMÁTICA EM SOLOS ARENOSOS MANEJADOS COM SAF NO PONTAL DO PARANAPANEMA","authors":"Letícia Aparecida Costa Magro, Rita de Cássia Lima Mazzuchelli, Marcelo Rodrigo Alves","doi":"10.5747/ce.2022.v14.e398","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e398","url":null,"abstract":"Ecological systems are fundamental to the principles of biodiversity, nutrient cycling, ecological ecosystems and reproduction of dynamics. The objective of the work was used with microbiological parameters to evaluate the quality of agroforestry systems in implantation ages, and to compare them with occupied areas with pastures without management (same use) and native forests, in a total of 5 areas, located in Pontal do paranapanema. The methodology consisted of a bibliographic survey, collections and soil examinations. For each of the selected areas, a grid with 5 random points was defined for collecting soil samples at a depth of 0-10 cm. The offers made were: Dehydrogenase enzymatic activity; Phosphatase activity; ß-glycosidase; Arylsulfatase activity; and FDA. as collected from companies contracted for Unoeste's soil laboratory. The data obtained in the experiments were selected for statistical analysis. As enzymes were shown to change phosphatase and were not significant between treatments, the phosphatase changes observed in the FDA analyzes and the glycoside survey were altered.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81665068","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e393
Daniel Veras Correa, A. Ramos, Lucas Prado Osco, L. A. C. Jorge
The integration between the areas of remote sensing and machine learning has allowed an advance in the way of mapping agricultural fields and monitoring crops. This work investigates the ability of machine learning algorithms to classify soybean plants under insect attack, using reflectance spectroscopy measurements collected at the leaf level. To this end, tests were developed with different algorithms using a set of 991 spectral curves referring to healthy soybean plants under attack by pests, collected in eight consecutive days. These curves were measured by the EMBRAPA team, using a portable spectroradiometer, which records in the range of 350 to 2500 nm. Such curves were, initially, pre-processed to remove the regions of atmospheric absorption by water vapor, and then subdivided into a set of training, validation and testing of the machine learning algorithms. The Google Collabs interpreter was used and the algorithms were written in Python language, using libraries such as Skit Sklearn. Among the algorithms used, there are Random Forest, Decision Tree, Support Vector Machine, Logistic Regression and Extra-Tree. The Extra-tree has better performance (F1-score = 80.40%; precision = 81%; recall = 80%) in the proposed task. It is concluded that it is possible to process reflectance spectroscopy measurements with machine learning algorithms to monitor insect attack on soybean plants. It is recommended that the applied approach be tested in other cultures.
{"title":"APRENDIZAGEM DE MÁQUINA PARA IDENTIFICAÇÃO DE PLANTAS DE SOJA SOB ATAQUE DE INSETOS USANDO DADOS HIPERESPECTRAIS","authors":"Daniel Veras Correa, A. Ramos, Lucas Prado Osco, L. A. C. Jorge","doi":"10.5747/ce.2022.v14.e393","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e393","url":null,"abstract":"The integration between the areas of remote sensing and machine learning has allowed an advance in the way of mapping agricultural fields and monitoring crops. This work investigates the ability of machine learning algorithms to classify soybean plants under insect attack, using reflectance spectroscopy measurements collected at the leaf level. To this end, tests were developed with different algorithms using a set of 991 spectral curves referring to healthy soybean plants under attack by pests, collected in eight consecutive days. These curves were measured by the EMBRAPA team, using a portable spectroradiometer, which records in the range of 350 to 2500 nm. Such curves were, initially, pre-processed to remove the regions of atmospheric absorption by water vapor, and then subdivided into a set of training, validation and testing of the machine learning algorithms. The Google Collabs interpreter was used and the algorithms were written in Python language, using libraries such as Skit Sklearn. Among the algorithms used, there are Random Forest, Decision Tree, Support Vector Machine, Logistic Regression and Extra-Tree. The Extra-tree has better performance (F1-score = 80.40%; precision = 81%; recall = 80%) in the proposed task. It is concluded that it is possible to process reflectance spectroscopy measurements with machine learning algorithms to monitor insect attack on soybean plants. It is recommended that the applied approach be tested in other cultures.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"103 25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86534726","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e396
Alessandro Igor Da Silva Lopes, Amanda Magalhães das Neves, João Fernando Gomes de Oliveira, Natacha Moriana Canei, Rafael Schlaucher Krass Zacarão, Rafaela Ansiliero, Richeli Stefanello, Georgia Ane Raquel Sehn, E. Rigo
Bamboo is a widely used forest resource and has a high fiber content in its shoots, which makes it considered as a nutritious and healthy food. Due to the water retention capacity of the fibers, it has the potential for flour production, and can be used as a thickener in products that have little firmness such as Petit Suisse. This study aimed to prepare a Petit Suisse type cheese using bamboo shoot flour as an alternative source of natural thickener and, therefore, to evaluate the impact on the physicochemical composition and texture profile of the product. The results showed that the addition of different amounts of bamboo fiber to the product had no effect on pH, moisture, fat and protein, but on texture parameters and on the effect of syneresis, product with the highest percentage of bamboo fiber (0.75%) was firmer and gummy, less elastic and with less syneresis effect during storage.
{"title":"ELABORAÇÃO E CARACTERIZAÇÃO FÍSICO - QUÍMICA DE QUEIJO Petit SUISSE ADICIONADO DE FIBRA DE BAMBU","authors":"Alessandro Igor Da Silva Lopes, Amanda Magalhães das Neves, João Fernando Gomes de Oliveira, Natacha Moriana Canei, Rafael Schlaucher Krass Zacarão, Rafaela Ansiliero, Richeli Stefanello, Georgia Ane Raquel Sehn, E. Rigo","doi":"10.5747/ce.2022.v14.e396","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e396","url":null,"abstract":"Bamboo is a widely used forest resource and has a high fiber content in its shoots, which makes it considered as a nutritious and healthy food. Due to the water retention capacity of the fibers, it has the potential for flour production, and can be used as a thickener in products that have little firmness such as Petit Suisse. This study aimed to prepare a Petit Suisse type cheese using bamboo shoot flour as an alternative source of natural thickener and, therefore, to evaluate the impact on the physicochemical composition and texture profile of the product. The results showed that the addition of different amounts of bamboo fiber to the product had no effect on pH, moisture, fat and protein, but on texture parameters and on the effect of syneresis, product with the highest percentage of bamboo fiber (0.75%) was firmer and gummy, less elastic and with less syneresis effect during storage.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82297080","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e397
Naiara Maria Pavani, D. A. Macena, Jacqueline Roberta Tamashiro, L. H. C. Silva, Maryane Pipino Beraldo Almeida, A. Kinoshita
The reuse of effluent water is one of the main challenges to achieve a more sustainable development. Dyes from the textile industry can percolate, contaminate soils and affect water courses. Advanced Oxidative Processes (AOP), such as heterogeneous photocatalysis with UV light radiation and metallic nanoparticles, generate reactive oxygen species and hydroxyl radicals that can reduce effluent pollutants. This work synthesized zinc oxide (ZnO-NP) and titanium dioxide (TiO2-NP) nanoparticles in order to photodegrade methylene blue and tartrazine yellow dyes. The crystallographic and morphological characterization of the nanoparticles was performed by X-ray diffraction and high resolution scanning electron microscopy. The syntheses produced nanometric particles. The methylene blue dye had greater degradation by TiO2-NP (82 to 85%), whereas the tartrazine yellow dye with ZnO-NP (79.6% removal). It is concluded that the nanoparticles combined with POA are an effective alternative for the photocatalytic degradation of dyes.
{"title":"NANOPARTÍCULAS DE DIÓXIDO DE TITÂNIO E ÓXIDO DE ZINCO: SÍNTESE, CARACTERIZAÇÃO E AÇÃO FOTOCATALÍTICA EM EFLUENTES INDUSTRIAIS","authors":"Naiara Maria Pavani, D. A. Macena, Jacqueline Roberta Tamashiro, L. H. C. Silva, Maryane Pipino Beraldo Almeida, A. Kinoshita","doi":"10.5747/ce.2022.v14.e397","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e397","url":null,"abstract":"The reuse of effluent water is one of the main challenges to achieve a more sustainable development. Dyes from the textile industry can percolate, contaminate soils and affect water courses. Advanced Oxidative Processes (AOP), such as heterogeneous photocatalysis with UV light radiation and metallic nanoparticles, generate reactive oxygen species and hydroxyl radicals that can reduce effluent pollutants. This work synthesized zinc oxide (ZnO-NP) and titanium dioxide (TiO2-NP) nanoparticles in order to photodegrade methylene blue and tartrazine yellow dyes. The crystallographic and morphological characterization of the nanoparticles was performed by X-ray diffraction and high resolution scanning electron microscopy. The syntheses produced nanometric particles. The methylene blue dye had greater degradation by TiO2-NP (82 to 85%), whereas the tartrazine yellow dye with ZnO-NP (79.6% removal). It is concluded that the nanoparticles combined with POA are an effective alternative for the photocatalytic degradation of dyes.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84054473","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e389
Fabrício Milanez, Francisco Assis da Silva, Flávio Pandur Albuquerque Cabral, Leandro Luiz de Almeida, A. O. Artero, M. A. Piteri
New technologies, such as 3D printers and autonomous cars for instance, originating from advances in Computer Vision and other fields, have been causing an increasingly high interest in robust pipelines for 3D reconstruction of real environments and objects. Through use of 3D reconstruction methods, it is possible to create an application that takes digital photographs of an observed scene as inputs and is capable of obtaining a 3D model that represents it. This model could then be used in a wide range of applications, such as game asset generation, video manipulation with special effects or object replication with the use of a 3D printer, for instance. In this paper, we address, present and discuss methods that concern the different stages of a traditional 3D reconstruction pipeline from digital images only in the implementation and use of computational tools that were capable of generating 3D models that represent a scene observed these images with high fidelity.
{"title":"RECONSTRUÇÃO 3D DE CENAS E OBJETOS A PARTIR DE IMAGENS DIGITAIS","authors":"Fabrício Milanez, Francisco Assis da Silva, Flávio Pandur Albuquerque Cabral, Leandro Luiz de Almeida, A. O. Artero, M. A. Piteri","doi":"10.5747/ce.2022.v14.e389","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e389","url":null,"abstract":"New technologies, such as 3D printers and autonomous cars for instance, originating from advances in Computer Vision and other fields, have been causing an increasingly high interest in robust pipelines for 3D reconstruction of real environments and objects. Through use of 3D reconstruction methods, it is possible to create an application that takes digital photographs of an observed scene as inputs and is capable of obtaining a 3D model that represents it. This model could then be used in a wide range of applications, such as game asset generation, video manipulation with special effects or object replication with the use of a 3D printer, for instance. In this paper, we address, present and discuss methods that concern the different stages of a traditional 3D reconstruction pipeline from digital images only in the implementation and use of computational tools that were capable of generating 3D models that represent a scene observed these images with high fidelity.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86265650","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e388
Guilherme Antonio Gomes Nascimento, Margarida Nascimento, Robson Augusto Siscoutto
The art discipline aims to develop in the student a critical interaction with the complexity of the world and favor respect for the diversity of cultures and peoples. The current methodology in the classroom uses traditional and non-technological methods for teaching and learning this type of discipline, generating demotivation to the student. The insertion of technology in the classroom, such as Virtual Reality, can help in the abstraction of problems and concepts intrinsic to the discipline, motivating it in its teaching/learning process. However, there are few applications being used in public schools due to lack of resources or interest. Therefore, this paper presents a virtual reality tool that provides interactive three-dimensional virtual environments in order to assist the teaching/learning of students at the Brazilian elementary school of Art discipline. The virtual environments were evaluated by the project researchers by means of a specific usability questionnaire for this type of environment, obtaining a final average of 4.67 of 5.0, being considered suitable for use in the future in classrooms.
{"title":"ARTEACHINGVR: O ENSINO DAS ARTES AUXILIADO PELA REALIDADE VIRTUAL NAS ESCOLAS DE ENSINO FUNDAMENTAL ESTADUAL BRASILEIRO","authors":"Guilherme Antonio Gomes Nascimento, Margarida Nascimento, Robson Augusto Siscoutto","doi":"10.5747/ce.2022.v14.e388","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e388","url":null,"abstract":"The art discipline aims to develop in the student a critical interaction with the complexity of the world and favor respect for the diversity of cultures and peoples. The current methodology in the classroom uses traditional and non-technological methods for teaching and learning this type of discipline, generating demotivation to the student. The insertion of technology in the classroom, such as Virtual Reality, can help in the abstraction of problems and concepts intrinsic to the discipline, motivating it in its teaching/learning process. However, there are few applications being used in public schools due to lack of resources or interest. Therefore, this paper presents a virtual reality tool that provides interactive three-dimensional virtual environments in order to assist the teaching/learning of students at the Brazilian elementary school of Art discipline. The virtual environments were evaluated by the project researchers by means of a specific usability questionnaire for this type of environment, obtaining a final average of 4.67 of 5.0, being considered suitable for use in the future in classrooms.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"394 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86826459","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e387
D. Zambrano, Larissa Maria Volcov Alves, Matheus Lessa Moreira, R. Nunes
The need for lighter, lower-cost construction has intensified, so the presence of cold-formed profiles has become common in civil construction, offering greater efficiency in the ability to withstand the current demands. The present article aimed at the theoretical study on the stability of double U and U lipped sections, composed of cold formed steel profiles, submitted to compression. Under the justification of analyzing the effectiveness of this type of structural element, with the help of the CUFSM Software that uses the Finite Strip Method, and verify the resistance by the Direct Strength Method (DSM). The objectives of this study were: to investigate the modeling in the CUFSM software for a double section with profiles connected to each other; and apply the DSM to the theoretical analysis of double sections with Brazilian commercial profiles. It was found that the variation in the number of connections influences the analysis and can reproduce the partial connection behavior. The application of folds proved to be efficient, with little influence on local instability and considerable influence on distortion instability. The DSM showed a loss of resistance for the models that presented a local failure mode, being, therefore, the most important factor regarding the resistance.
{"title":"ANÁLISE TEÓRICA PELO MÉTODO DA RESISTÊNCIA DIRETA DE SEÇÕES DUPLAS DE PERFIS DE AÇO FORMADOS A FRIO SOB COMPRESSÃO","authors":"D. Zambrano, Larissa Maria Volcov Alves, Matheus Lessa Moreira, R. Nunes","doi":"10.5747/ce.2022.v14.e387","DOIUrl":"https://doi.org/10.5747/ce.2022.v14.e387","url":null,"abstract":"The need for lighter, lower-cost construction has intensified, so the presence of cold-formed profiles has become common in civil construction, offering greater efficiency in the ability to withstand the current demands. The present article aimed at the theoretical study on the stability of double U and U lipped sections, composed of cold formed steel profiles, submitted to compression. Under the justification of analyzing the effectiveness of this type of structural element, with the help of the CUFSM Software that uses the Finite Strip Method, and verify the resistance by the Direct Strength Method (DSM). The objectives of this study were: to investigate the modeling in the CUFSM software for a double section with profiles connected to each other; and apply the DSM to the theoretical analysis of double sections with Brazilian commercial profiles. It was found that the variation in the number of connections influences the analysis and can reproduce the partial connection behavior. The application of folds proved to be efficient, with little influence on local instability and considerable influence on distortion instability. The DSM showed a loss of resistance for the models that presented a local failure mode, being, therefore, the most important factor regarding the resistance.","PeriodicalId":30414,"journal":{"name":"Colloquium Exactarum","volume":"97 2-3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78138846","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}
Pub Date : 2023-01-05DOI: 10.5747/ce.2022.v14.e394
Janardelly Gomes de Souza, Marcelo Rodrigo Alves
The adequate characterization of solid residues is important, as it makes it possible to estimate the variability of its composition, helping to define its use in the soil. The objective of the presente study was to characterize raw materials and biochars produced under laboratory conditions, in order to analyze their feasibiity for use in the soil. Thus, the biochars were produced from the dry sample of biosolid and, from a dry sample of sugarcane bagasse, separately, by means of slow pyrolysis at a temperature of 350°C. A design with five replications was used, where the treatments were constituted by: pure biosolid (BP); pure sugarcane bagasse (BCP); biosolid biochar (BB); sugarcane bagasse biochar (BBC). The evaluation of raw materials and biochars was through immediate analysis, hydrogenion potential, electrical conductivity, organic matter, total nitrogen, cátion Exchange capacity, and X-ray fluorescence spectrometry. The data obtained in the characterization of the materials were submited to analysis of variance by the SISVAR program. To compare the means, the Tukey test was used program. To compare the means, the Tukey test was used at 5% probability (p<0.05). BP and BB had more alcaline pH, higher ash contente, higher nitrogen content and cátion Exchange capacity. While the BCP nd BBC showed higher values for organic matter and carbono. The raw materials and their respective biochars showed characteristics suitable for agricultural use, mainly BP and BB, and BP and BB can be used as soil correctors, as They have na alcaline pH of 12.02 and 9.64.
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