Pub Date : 2023-02-14DOI: 10.18011/bioeng.2022.v16.1177
Hugo Thaner dos Santos, Sergio Nascimento Duarte
Most Brazilian cities do not have a proper water and soil management system due to lack of planning in this sector and of an easy-consultation local-hydrological bibliography capable of reinforcing the future creation of a hydrological modeling. Volta Redonda macro-region's case can be added to this statistics, since it accounts for several natural hazards linked to floods and inundations in some specific locations. The aims of the present study are to descriptively analyze monthly rainfall data generated by CEMADEN's rainfall gauges and to assess whether monthly rainfall in the region adapts well to probability Gamma Distribution plots. Rainfall data from four points in Volta Redonda, Barra Mansa and Pinheiral cities, recorded for 48 months, and provided by CEMADEN, were used in the study. Gamma Distribution was adjusted to monthly rainfall data. In conclusion, the probability of having a given monthly rainfall value lower than, or equal to, that recorded for the Pinheiral – Volta Redonda – Barra Mansa conurbation area can be estimated through Gamma Distribution. Values recorded for shape (γ) and scale (β) parameters of Volta Redonda macro-region's municipalities were 1.59 and 79.30, on average, respectively.
{"title":"Rainfall data adjustment to Volta Redonda macro-region","authors":"Hugo Thaner dos Santos, Sergio Nascimento Duarte","doi":"10.18011/bioeng.2022.v16.1177","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1177","url":null,"abstract":"Most Brazilian cities do not have a proper water and soil management system due to lack of planning in this sector and of an easy-consultation local-hydrological bibliography capable of reinforcing the future creation of a hydrological modeling. Volta Redonda macro-region's case can be added to this statistics, since it accounts for several natural hazards linked to floods and inundations in some specific locations. The aims of the present study are to descriptively analyze monthly rainfall data generated by CEMADEN's rainfall gauges and to assess whether monthly rainfall in the region adapts well to probability Gamma Distribution plots. Rainfall data from four points in Volta Redonda, Barra Mansa and Pinheiral cities, recorded for 48 months, and provided by CEMADEN, were used in the study. Gamma Distribution was adjusted to monthly rainfall data. In conclusion, the probability of having a given monthly rainfall value lower than, or equal to, that recorded for the Pinheiral – Volta Redonda – Barra Mansa conurbation area can be estimated through Gamma Distribution. Values recorded for shape (γ) and scale (β) parameters of Volta Redonda macro-region's municipalities were 1.59 and 79.30, on average, respectively.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42655555","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 : 2023-02-09DOI: 10.18011/bioeng.2022.v16.1151
Allyson Ângelo Da Cruz, A. A. Ribeiro, Willamir de Oliveira Maciel, Pedro Lucas Souza Irmão, Cira Belém Gonçalves Correia
The aim of this study was to evaluate the salinity tolerance of cotton plants grown under saline stress in two substrates. The experiment was carried out in an experimental area at the Centec Cariri School of Technology (FATEC Cariri), located in the city of Juazeiro do Norte, Ceará state. A completely randomized design was applied, using a 4 x 2 factorial scheme consisting of four irrigation water salinity levels (0.5; 3.0; 5.0, and 10 dS m-1) and two substrates (0 - 20 cm soil layers and earthworm humus) with four replications. To assess the tolerance of cotton plants to salinity, the methodology proposed by Fageria (1985) was used. The percentage reductions in plant height, absolute growth rate, stem diameter, number of leaves, and leaf area of cotton plants submitted to different levels of irrigation with saline water in the two substrates were quantified, comparing them to the control (plants cultivated with water whose electrical conductivity is equal to 0.5 dS m-1). Based on the found results, it was found that the used type of substrate changed the classification of cotton salinity tolerance, especially at the highest salinity levels tested (5.0 and 10 dS m-1). When considering the data of stem diameter and leaf area, cotton plants grown in soil substrate showed greater tolerance to salinity. However, from the data regarding absolute growth rate and number of leaves, cotton plants grown in earthworm humus substrate were more tolerant to salinity.
本研究的目的是评估在两种基质中在盐胁迫下生长的棉花植物的耐盐性。该实验在位于Ceará州Juazeiro do Norte市的Centec Cariri理工学院（FATEC Cariri）的实验区进行。采用完全随机设计，采用4×2因子方案，包括四个灌溉水盐度水平（0.5、3.0、5.0和10dS m-1）和两个基质（0-20 cm土层和蚯蚓腐殖质），并进行四次重复。为了评估棉花植物对盐度的耐受性，使用了Fageria（1985）提出的方法。对两种基质中用盐水灌溉不同水平的棉花植株的株高、绝对生长速率、茎径、叶片数量和叶面积的减少百分比进行了量化，并将其与对照（用电导率等于0.5dSm-1的水培养的植株）进行了比较。根据发现的结果，发现使用的基质类型改变了棉花耐盐性的分类，尤其是在测试的最高盐度水平（5.0和10dS m-1）下。当考虑茎径和叶面积的数据时，生长在土壤基质中的棉花植物表现出更大的耐盐性。然而，从绝对生长速率和叶片数量的数据来看，生长在蚯蚓腐殖质基质中的棉花植物更耐盐碱。
{"title":"Evaluation of the salinity tolerance of cotton trees under saline stress on two substrates","authors":"Allyson Ângelo Da Cruz, A. A. Ribeiro, Willamir de Oliveira Maciel, Pedro Lucas Souza Irmão, Cira Belém Gonçalves Correia","doi":"10.18011/bioeng.2022.v16.1151","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1151","url":null,"abstract":"The aim of this study was to evaluate the salinity tolerance of cotton plants grown under saline stress in two substrates. The experiment was carried out in an experimental area at the Centec Cariri School of Technology (FATEC Cariri), located in the city of Juazeiro do Norte, Ceará state. A completely randomized design was applied, using a 4 x 2 factorial scheme consisting of four irrigation water salinity levels (0.5; 3.0; 5.0, and 10 dS m-1) and two substrates (0 - 20 cm soil layers and earthworm humus) with four replications. To assess the tolerance of cotton plants to salinity, the methodology proposed by Fageria (1985) was used. The percentage reductions in plant height, absolute growth rate, stem diameter, number of leaves, and leaf area of cotton plants submitted to different levels of irrigation with saline water in the two substrates were quantified, comparing them to the control (plants cultivated with water whose electrical conductivity is equal to 0.5 dS m-1). Based on the found results, it was found that the used type of substrate changed the classification of cotton salinity tolerance, especially at the highest salinity levels tested (5.0 and 10 dS m-1). When considering the data of stem diameter and leaf area, cotton plants grown in soil substrate showed greater tolerance to salinity. However, from the data regarding absolute growth rate and number of leaves, cotton plants grown in earthworm humus substrate were more tolerant to salinity.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41457783","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 : 2023-01-23DOI: 10.18011/bioeng.2022.v16.1094
M. Passos, Arthur Breno Rocha Mariano, Daniela Andreska da Silva, Alan Bernard Oliveira de Sousa
Monitoring the quality of irrigation water can help in the maintenance of filters and irrigation systems, avoiding clogs and uniformity problems. The objective of this work was, thus, to evaluate the performance of sensor modules for monitoring irrigation water quality variables. For that, three sensors were evaluated, and their performance was rated from the adjustment of calibration equations, obtained through linear regression analysis (yi = b0 + b1xi + εi), using the ordinary least squares method (OLS) to estimate its parameters (β0 and β1). The first sensor evaluated was the Ph4502c for pH measurement. Direct methodology was used, using standard pH solutions (1.79; 4.5; 6.88; 12.13; and 13.99) and an electrode type BNC probe. The second evaluated sensor was turbidity model TSW30. To evaluate the total dissolved solids (TDS) sensor, the direct method was applied, using solutions with electrical conductivity of 0.50, 1.0, and 2.0 dS m-1. To investigate the assumptions of independence, homoscedasticity, and normality of the residuals of the linear regression models, the Durbin-Watson, Breusch-Pagan, and Kolmogorov-Smirnov tests were respectively used. In the evaluation of the statistical performance, the indicators of the root-mean-square error, coefficient of determination, correlation coefficient, confidence index, and index of agreement were adopted. The ordinary least squares method did not produce the best unbiased linear estimators for the calibration equations of the pH, turbidity, and TDS sensors, due to the violation of the regression assumptions. The adjustments showed good accuracy for water quality assessment, according to high performance statistics and models classified as ‘Excellent’.
{"title":"Performance of sensors for quality analysis of irrigation water","authors":"M. Passos, Arthur Breno Rocha Mariano, Daniela Andreska da Silva, Alan Bernard Oliveira de Sousa","doi":"10.18011/bioeng.2022.v16.1094","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1094","url":null,"abstract":"Monitoring the quality of irrigation water can help in the maintenance of filters and irrigation systems, avoiding clogs and uniformity problems. The objective of this work was, thus, to evaluate the performance of sensor modules for monitoring irrigation water quality variables. For that, three sensors were evaluated, and their performance was rated from the adjustment of calibration equations, obtained through linear regression analysis (yi = b0 + b1xi + εi), using the ordinary least squares method (OLS) to estimate its parameters (β0 and β1). The first sensor evaluated was the Ph4502c for pH measurement. Direct methodology was used, using standard pH solutions (1.79; 4.5; 6.88; 12.13; and 13.99) and an electrode type BNC probe. The second evaluated sensor was turbidity model TSW30. To evaluate the total dissolved solids (TDS) sensor, the direct method was applied, using solutions with electrical conductivity of 0.50, 1.0, and 2.0 dS m-1. To investigate the assumptions of independence, homoscedasticity, and normality of the residuals of the linear regression models, the Durbin-Watson, Breusch-Pagan, and Kolmogorov-Smirnov tests were respectively used. In the evaluation of the statistical performance, the indicators of the root-mean-square error, coefficient of determination, correlation coefficient, confidence index, and index of agreement were adopted. The ordinary least squares method did not produce the best unbiased linear estimators for the calibration equations of the pH, turbidity, and TDS sensors, due to the violation of the regression assumptions. The adjustments showed good accuracy for water quality assessment, according to high performance statistics and models classified as ‘Excellent’.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45902642","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 : 2023-01-23DOI: 10.18011/bioeng.2022.v16.1129
Tavani Rocha Camargo, G. Wolff Bueno, Levi P. Machado, Maicon R. Brande, Beatriz S. Heitzman, Thiago D. Trombeta
Aquatic plants have a high potential to be used as eco-friendly technology in fish farming effluent treatment systems. However, there is still a reduced use of the vegetable biomass produced in these treatment systems. Thus, the aim of this study was to develop an alternative feed with the aquatic plant Azolla pinnata to take advantage of plant biomass, reusing the plant to develop a new product and promote a circular economy. A. pinnata was implemented in decantation pond that receives effluents from fish farming. Samples were collected weekly at four times (0, 7, 14, and 21 days). Posteriorly, A. pinnata was processed to obtain the meal. Azolla meal was offered along with three commercial feed (24%, 28% and 32% of the crude protein) in an experiment to evaluate the zootechnical performance of tilapia in small tanks. The results indicated that A. pinnata was efficient to retention of phosphorus and nitrogen after seven days. In the experiment with animals, the treatment using commercial feed with 28% of the crude protein + Azolla showed the best efficiency rates for using the diet. Thus, the use of the A. pinnata meal was a viable alternative in the search for sustainable products to promote a bioeconomy in the small fish farms.
{"title":"Bioprocess for mass production and feed utilization of Azolla pinnata in aquaculture ponds: a perspective of bioeconomy and eco-friendly technology for small farms","authors":"Tavani Rocha Camargo, G. Wolff Bueno, Levi P. Machado, Maicon R. Brande, Beatriz S. Heitzman, Thiago D. Trombeta","doi":"10.18011/bioeng.2022.v16.1129","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1129","url":null,"abstract":"Aquatic plants have a high potential to be used as eco-friendly technology in fish farming effluent treatment systems. However, there is still a reduced use of the vegetable biomass produced in these treatment systems. Thus, the aim of this study was to develop an alternative feed with the aquatic plant Azolla pinnata to take advantage of plant biomass, reusing the plant to develop a new product and promote a circular economy. A. pinnata was implemented in decantation pond that receives effluents from fish farming. Samples were collected weekly at four times (0, 7, 14, and 21 days). Posteriorly, A. pinnata was processed to obtain the meal. Azolla meal was offered along with three commercial feed (24%, 28% and 32% of the crude protein) in an experiment to evaluate the zootechnical performance of tilapia in small tanks. The results indicated that A. pinnata was efficient to retention of phosphorus and nitrogen after seven days. In the experiment with animals, the treatment using commercial feed with 28% of the crude protein + Azolla showed the best efficiency rates for using the diet. Thus, the use of the A. pinnata meal was a viable alternative in the search for sustainable products to promote a bioeconomy in the small fish farms.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48667191","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 : 2023-01-23DOI: 10.18011/bioeng.2022.v16.1104
Matheus Gaspar Schwan, Gabriel Brioschi Andreão, Maria Eduarda Carolo Freitas, Pedro Henrique Steill de Oliveira, Edvaldo Fialho dos Reis
The water deficit is considered one of the main problems in coffee culture around the world. As a way to get around this problem, producers all over the world adopt the practice of irrigation. However, in the most cultivated areas, a rational irrigation management is not carried out, resulting in excessive or insufficient applications. Based on this, the present work aimed to evaluate the effect of different methods of evapotranspiration estimative and water deficit levels on the growth rates of the clonal conilon coffee. The experiment was conducted in a greenhouse, in a 2 x 3 factorial scheme with the factor evapotranspiration in 2 levels (Penman-Monteith (PM) and Hargreaves & Samani (HS), and the factor water deficit in 3 levels (80%, 50% and 30% of Evapotranspiration of Reference (ETo)) in a completely randomized design. From the results obtained, it was observed that the evapotranspiration estimation method and the water deficit levels had an effect on the growth rates and free assimilation rate of the clonal conilon coffee tree, with the highest growth values in plants irrigated with 80% of ETo by the HS method, and higher assimilation values in plants irrigated with 80% of ETo by the PM method.
{"title":"Effect of different methods for estimation of evapotranspiration and water deficit in soil on the growth rates of conilon clonal coffee","authors":"Matheus Gaspar Schwan, Gabriel Brioschi Andreão, Maria Eduarda Carolo Freitas, Pedro Henrique Steill de Oliveira, Edvaldo Fialho dos Reis","doi":"10.18011/bioeng.2022.v16.1104","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1104","url":null,"abstract":"The water deficit is considered one of the main problems in coffee culture around the world. As a way to get around this problem, producers all over the world adopt the practice of irrigation. However, in the most cultivated areas, a rational irrigation management is not carried out, resulting in excessive or insufficient applications. Based on this, the present work aimed to evaluate the effect of different methods of evapotranspiration estimative and water deficit levels on the growth rates of the clonal conilon coffee. The experiment was conducted in a greenhouse, in a 2 x 3 factorial scheme with the factor evapotranspiration in 2 levels (Penman-Monteith (PM) and Hargreaves & Samani (HS), and the factor water deficit in 3 levels (80%, 50% and 30% of Evapotranspiration of Reference (ETo)) in a completely randomized design. From the results obtained, it was observed that the evapotranspiration estimation method and the water deficit levels had an effect on the growth rates and free assimilation rate of the clonal conilon coffee tree, with the highest growth values in plants irrigated with 80% of ETo by the HS method, and higher assimilation values in plants irrigated with 80% of ETo by the PM method.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42894720","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 : 2022-12-15DOI: 10.18011/bioeng.2022.v16.1124
Bruno Passador Lombardi, Império Lombardi Jr
The objective of this study was to demonstrate the importance of the vertical farm as an alternative for the supply of food to the world population, mainly, in the countries where the scarcity of land is evident. We linked the use of the vertical farm with the objectives of sustainable developments developed by United Nations (UN) in the fight against hunger and social inequalities in the world. A search was carried out in the databases Pubmed, Web of Science and specialized sites, using the words, vertical farm, fight against hunger and food production. According to the articles found, we could conclude that the use of the vertical farm can bring great advances in improving the supply of food to the low-income population; however, there is a need for budgetary adequacy for the implementation and operation of the entire system, being that in in some cases the costs are very high. This causes a certain skepticism in its viability. The collaboration of government agencies, non-governmental organizations and private initiative with financial support for the creation of vertical farms is essential
这项研究的目的是证明垂直农场作为向世界人口供应粮食的替代品的重要性，主要是在土地短缺明显的国家。我们将垂直农场的使用与联合国在消除世界饥饿和社会不平等方面制定的可持续发展目标联系起来。在Pubmed、Web of Science和专门网站的数据库中进行了搜索，使用了“垂直农场”、“对抗饥饿”和“粮食生产”等词。根据发现的文章，我们可以得出结论，垂直农场的使用可以在改善低收入人口的粮食供应方面带来巨大进步；然而，整个系统的实施和运作需要有充足的预算，因为在某些情况下成本非常高。这引起了人们对其可行性的怀疑。政府机构、非政府组织和私人倡议的合作以及对创建垂直农场的财政支持至关重要
{"title":"Vertical farm: prospects for achieving sustainable development goals","authors":"Bruno Passador Lombardi, Império Lombardi Jr","doi":"10.18011/bioeng.2022.v16.1124","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1124","url":null,"abstract":"The objective of this study was to demonstrate the importance of the vertical farm as an alternative for the supply of food to the world population, mainly, in the countries where the scarcity of land is evident. We linked the use of the vertical farm with the objectives of sustainable developments developed by United Nations (UN) in the fight against hunger and social inequalities in the world. A search was carried out in the databases Pubmed, Web of Science and specialized sites, using the words, vertical farm, fight against hunger and food production. According to the articles found, we could conclude that the use of the vertical farm can bring great advances in improving the supply of food to the low-income population; however, there is a need for budgetary adequacy for the implementation and operation of the entire system, being that in in some cases the costs are very high. This causes a certain skepticism in its viability. The collaboration of government agencies, non-governmental organizations and private initiative with financial support for the creation of vertical farms is essential","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45220114","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 : 2022-11-15DOI: 10.18011/bioeng.2022.v16.1175
A. Bonini Neto, Vitória Ferreira da Silva Fávaro, Wesley Prado Leão dos Santos, Jéssica Marques de Mello, Angela Vacaro de Souza
Agriculture is one of the pillars of human existence since it allows for the obtention of food as well as other products for food production processes. In this regard, there are some crops, such as climactic fruits, that face difficulties especially regarding classification of their maturation stages at the time of harvest, which is the case of bananas, the focus of this work. Therefore, there are some techniques that use artificial neural networks to classify them, such as multilayer networks. Examples of such networks are Perceptron, widely used in several areas, and Radial Base Functional networks (RBF), whose studies are incipient and have little use in agricultural areas. Hence, the objective of the present work was to carry out a comparison between these two neural networks to verify which provides the highest accuracy. In this work it was possible to verify that radial base functional neural networks provide a faster and more efficient categorization for the stages of bananas maturation, because they do not require training and, therefore, have low computational cost, saving more energy, when compared to a Multilayer Perceptron. Therefore, it can be inferred that Radial Base Functional Artificial Neural Networks (RBF ANN) can be widely used in agriculture, enabling the improvement of different cultures and different processes, such as harvesting.
{"title":"Radial base neural network for the detection of banana maturation stages: perceptron multilayer network comparison","authors":"A. Bonini Neto, Vitória Ferreira da Silva Fávaro, Wesley Prado Leão dos Santos, Jéssica Marques de Mello, Angela Vacaro de Souza","doi":"10.18011/bioeng.2022.v16.1175","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1175","url":null,"abstract":"Agriculture is one of the pillars of human existence since it allows for the obtention of food as well as other products for food production processes. In this regard, there are some crops, such as climactic fruits, that face difficulties especially regarding classification of their maturation stages at the time of harvest, which is the case of bananas, the focus of this work. Therefore, there are some techniques that use artificial neural networks to classify them, such as multilayer networks. Examples of such networks are Perceptron, widely used in several areas, and Radial Base Functional networks (RBF), whose studies are incipient and have little use in agricultural areas. Hence, the objective of the present work was to carry out a comparison between these two neural networks to verify which provides the highest accuracy. In this work it was possible to verify that radial base functional neural networks provide a faster and more efficient categorization for the stages of bananas maturation, because they do not require training and, therefore, have low computational cost, saving more energy, when compared to a Multilayer Perceptron. Therefore, it can be inferred that Radial Base Functional Artificial Neural Networks (RBF ANN) can be widely used in agriculture, enabling the improvement of different cultures and different processes, such as harvesting.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42182534","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 : 2022-10-10DOI: 10.18011/bioeng.2022.v16.1121
Wedja Timóteo Vieira, Rafaela Gabriel, Karla Raphaela Braga de Melo, Lívia Maria de Oliveira Ribeiro, João Inácio Soletti, Sandra Helena Vieira de Carvalho
Biodiesel is a fuel derived from renewable sources such as vegetable oils, animal fats, or residual oils. Although it is a potential source of energy, the efficiency of the production of this fuel depends on several factors, including variables associated with the stirring and mixing process of the reactions. The proper choice of these variables can avoid the formation of vortices, favor the flow direction and the homogeneity of the mixture, and, consequently, contribute to a higher yield of biodiesel. In this context, the present work investigated the effect of agitation and mixing on the production of soybean biodiesel from the analysis of parameters: impeller (blade - turbine), stirring speed (150 rpm – 300 rpm), and baffle (with-without). For this, a 2³ factorial experimental design was carried out for the methylic and ethylic routes. In the reactions, the oil: alcohol molar ratio, amount of catalyst, time, and temperature were fixed. Experimental results indicated higher yields for reactions via the methylic route (more than 93%). Through the statistical analysis, it was also verified that the presence of a baffle and the use of a turbine impeller were the variables of greater statistical significance for the methylic and ethylic routes, respectively. These results showed that the variables considered had a significant impact on the yield of the reactions, although the reaction conditions remained constant, which reinforces that only the control of stirring and mixing parameters can promote optimal yields of the reactions, reducing costs with reagents, operating time, or temperature control.
{"title":"An experimental investigation of the mechanical variables influence on soybean biodiesel production using the response surface methodology","authors":"Wedja Timóteo Vieira, Rafaela Gabriel, Karla Raphaela Braga de Melo, Lívia Maria de Oliveira Ribeiro, João Inácio Soletti, Sandra Helena Vieira de Carvalho","doi":"10.18011/bioeng.2022.v16.1121","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1121","url":null,"abstract":"Biodiesel is a fuel derived from renewable sources such as vegetable oils, animal fats, or residual oils. Although it is a potential source of energy, the efficiency of the production of this fuel depends on several factors, including variables associated with the stirring and mixing process of the reactions. The proper choice of these variables can avoid the formation of vortices, favor the flow direction and the homogeneity of the mixture, and, consequently, contribute to a higher yield of biodiesel. In this context, the present work investigated the effect of agitation and mixing on the production of soybean biodiesel from the analysis of parameters: impeller (blade - turbine), stirring speed (150 rpm – 300 rpm), and baffle (with-without). For this, a 2³ factorial experimental design was carried out for the methylic and ethylic routes. In the reactions, the oil: alcohol molar ratio, amount of catalyst, time, and temperature were fixed. Experimental results indicated higher yields for reactions via the methylic route (more than 93%). Through the statistical analysis, it was also verified that the presence of a baffle and the use of a turbine impeller were the variables of greater statistical significance for the methylic and ethylic routes, respectively. These results showed that the variables considered had a significant impact on the yield of the reactions, although the reaction conditions remained constant, which reinforces that only the control of stirring and mixing parameters can promote optimal yields of the reactions, reducing costs with reagents, operating time, or temperature control.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46332397","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 : 2022-10-10DOI: 10.18011/bioeng.2022.v16.1114
Renata Fernandes Alves, F. Putti
The instability of climatic events intimidates the development of crops at a global level, as it can cause serious economic and social consequences in the face of increased demand for food. In this scenario, the use of images for early identification of water stress is considered a form of non-destructive identification of physical, biochemical, and plant development-related responses. Water deficit is responsible for triggering a series of responses in the plant due to the increase in the production of Reactive Oxygen Species (ROS) and the accumulation of Abscisic Acid (ABA) that promotes the closing of the stomata, limiting the evaporative cooling capacity performed by the plant, given the increase in its leaf temperature. The present article investigates the relationship between the water deficit in the plant and the consequent increase in its leaf temperature.
{"title":"Use of images for early identification of water stress","authors":"Renata Fernandes Alves, F. Putti","doi":"10.18011/bioeng.2022.v16.1114","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1114","url":null,"abstract":"The instability of climatic events intimidates the development of crops at a global level, as it can cause serious economic and social consequences in the face of increased demand for food. In this scenario, the use of images for early identification of water stress is considered a form of non-destructive identification of physical, biochemical, and plant development-related responses. Water deficit is responsible for triggering a series of responses in the plant due to the increase in the production of Reactive Oxygen Species (ROS) and the accumulation of Abscisic Acid (ABA) that promotes the closing of the stomata, limiting the evaporative cooling capacity performed by the plant, given the increase in its leaf temperature. The present article investigates the relationship between the water deficit in the plant and the consequent increase in its leaf temperature.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41256989","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 : 2022-09-30DOI: 10.18011/bioeng.2022.v16.1071
A. C. Marques Filho, K. P. Lanças
Constant exposure to high noise levels can cause health problems for agricultural machinery operators. Machines equipped with closed cabs can attenuate noise and preserve the operator from an unhealthy condition. Some studies show that in cabin tractors it is possible to renounce the use of hearing protection, however indoor equipment and air conditioning can reach high levels of noise, which need to be further investigated. The present study aimed to evaluate the noise emitted by a cabined agricultural tractor, in different points, inside and outside cabin, in the engine rotations of 800rpm, 2180rpm and 2500rpm. In each reading, 100 noise intensity values were automatically collected, over two minutes with the aid of a digital decibel meter device. The results were compared with the levels assumed by Annex 1 of the regulatory Brazilian standard NR 15, and it was found that the cabin was able to isolate the noise emitted by the engine and its external components in 15%, however, the internal noise reached 81dB(A). The cabin can attenuate external noise and offer a healthy working environment, however, in long working hours it is recommended to use personal protective equipment such as ear protectors.
{"title":"A CABINE DOS Can the tractor's cabin allow the noise at the operator's station?PODE ATENUAR O RUÍDO NO POSTO DO OPERADOR?","authors":"A. C. Marques Filho, K. P. Lanças","doi":"10.18011/bioeng.2022.v16.1071","DOIUrl":"https://doi.org/10.18011/bioeng.2022.v16.1071","url":null,"abstract":"Constant exposure to high noise levels can cause health problems for agricultural machinery operators. Machines equipped with closed cabs can attenuate noise and preserve the operator from an unhealthy condition. Some studies show that in cabin tractors it is possible to renounce the use of hearing protection, however indoor equipment and air conditioning can reach high levels of noise, which need to be further investigated. The present study aimed to evaluate the noise emitted by a cabined agricultural tractor, in different points, inside and outside cabin, in the engine rotations of 800rpm, 2180rpm and 2500rpm. In each reading, 100 noise intensity values were automatically collected, over two minutes with the aid of a digital decibel meter device. The results were compared with the levels assumed by Annex 1 of the regulatory Brazilian standard NR 15, and it was found that the cabin was able to isolate the noise emitted by the engine and its external components in 15%, however, the internal noise reached 81dB(A). The cabin can attenuate external noise and offer a healthy working environment, however, in long working hours it is recommended to use personal protective equipment such as ear protectors.","PeriodicalId":32292,"journal":{"name":"Revista Brasileira de Engenharia de Biossistemas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41429531","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：