Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.62457
Amanda Umbelina de Souza, J. Corrêa, Ronaldo Elias de Mello Junior, Paula Giarolla Silveira, K. S. Mendonça, J. Junqueira
Tomato is one of the most cultivated vegetables, playing important role in the human feed. Due to its characteristics and composition, tomatoes present reduced shelf life, and preservative techniques are required. In this study, response surface methodology was used to optimize process conditions during the osmotic dehydration (OD) of tomato slices, through the desirability function. Optimization factors were absolute pressure (21-89 kPa), vacuum application period (7-15 min), and osmotic solution water activity (0.893-0.943), while investigated responses were sodium incorporation (NaI), water loss (WL), solid gain (SG), weight reduction (WR), and osmodehydrated product water activity (ODaw). The optimized conditions were achieved, and a further hot-air drying (HAD) was conducted at different temperatures and air velocities. During the OD, lower absolute pressure, and osmotic solution water activity led to lower NaI and higher WL and WR. Shorter drying time and higher diffusivity were obtained at higher temperature and air velocity, during the HAD. The dried tomato slices with sodium incorporation reduction were evaluated with regard to the final water activity, rehydration and color, in which no significant differences (p > 0.05) were observed between the treatments.
{"title":"Optimization of osmotic pretreatment of tomato slices using response surface methodology and further hot-air drying","authors":"Amanda Umbelina de Souza, J. Corrêa, Ronaldo Elias de Mello Junior, Paula Giarolla Silveira, K. S. Mendonça, J. Junqueira","doi":"10.4025/actascitechnol.v45i1.62457","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.62457","url":null,"abstract":"Tomato is one of the most cultivated vegetables, playing important role in the human feed. Due to its characteristics and composition, tomatoes present reduced shelf life, and preservative techniques are required. In this study, response surface methodology was used to optimize process conditions during the osmotic dehydration (OD) of tomato slices, through the desirability function. Optimization factors were absolute pressure (21-89 kPa), vacuum application period (7-15 min), and osmotic solution water activity (0.893-0.943), while investigated responses were sodium incorporation (NaI), water loss (WL), solid gain (SG), weight reduction (WR), and osmodehydrated product water activity (ODaw). The optimized conditions were achieved, and a further hot-air drying (HAD) was conducted at different temperatures and air velocities. During the OD, lower absolute pressure, and osmotic solution water activity led to lower NaI and higher WL and WR. Shorter drying time and higher diffusivity were obtained at higher temperature and air velocity, during the HAD. The dried tomato slices with sodium incorporation reduction were evaluated with regard to the final water activity, rehydration and color, in which no significant differences (p > 0.05) were observed between the treatments.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90674015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.62018
Caio Marcelo Lourenço, F. Santos
This article seeks to examine how Hofstede's cultural dimensions act as predictive variables for country innovation. In order to clarify how national culture influence countries' capacity for innovation, regression models were developed, and comparisons were made. We will use the multivariate linear regression method for the analysis, with the scores obtained by countries in the GII as the dependent variable and the values of cultural dimensions as explanatory variables. Individualism, long-term orientation and indulgence dimensions have a positive influence on countries' innovation. However, there is a negative relationship between uncertainty to avoidance and innovation. Possible reasons for these associations may include greater professional focus, openness to new ideas and greater resistance to innovation. Since the reality of each country is different, whether due to its culture, history and social aspects or due to its geographical location and availability of natural resources, it is not possible to simply import policies from one context to another. Given these factors, an analysis is needed on how infrastructure and cultural difference can influence the innovative performance of countries. This study aims to expand the literature on how culture in its different forms assists in the innovation process of countries by presenting quantitative and qualitative results on which cultural dimensions are most relevant to innovation.
{"title":"Prediction of the innovative capacity of countries based on their cultural dimensions: an analysis of the global innovation index","authors":"Caio Marcelo Lourenço, F. Santos","doi":"10.4025/actascitechnol.v45i1.62018","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.62018","url":null,"abstract":"This article seeks to examine how Hofstede's cultural dimensions act as predictive variables for country innovation. In order to clarify how national culture influence countries' capacity for innovation, regression models were developed, and comparisons were made. We will use the multivariate linear regression method for the analysis, with the scores obtained by countries in the GII as the dependent variable and the values of cultural dimensions as explanatory variables. Individualism, long-term orientation and indulgence dimensions have a positive influence on countries' innovation. However, there is a negative relationship between uncertainty to avoidance and innovation. Possible reasons for these associations may include greater professional focus, openness to new ideas and greater resistance to innovation. Since the reality of each country is different, whether due to its culture, history and social aspects or due to its geographical location and availability of natural resources, it is not possible to simply import policies from one context to another. Given these factors, an analysis is needed on how infrastructure and cultural difference can influence the innovative performance of countries. This study aims to expand the literature on how culture in its different forms assists in the innovation process of countries by presenting quantitative and qualitative results on which cultural dimensions are most relevant to innovation.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74708921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.62821
Daniel das Neves Martins, A. Jungles, Roberto de Oliveira
The floor plan layout (FPL) is conceptualized as an ill-defined problem, due to the identification and formulation of objectives not being fully clear in the conceptual phase of the design. A solution to this issue is to convert the ill-defined problem into a well-defined problem. That is, to make the problem explicit, already in the initial phase of the design process, so that it readily allows the architects to know the requirements and constraints, to formulate the goals, and to apply solution strategies they can manage while solving the problem. This conversion makes it possible to solve the problem by a scientific method, through mathematical modeling of the decision-making problem, rather than by a drawn method, via sketches. It allows the architect to establish a relationship between design variables and house performance attributes, and to know the limits within which the solution, or solutions, can be found, aiding him in generating optimized solutions. In order to contribute to the solution of this issue, we present the computational tool ARLE GPS (geometric planning solver). The tool acts as a physical-biological model of the FPL of house. The physical model is structured by a sophisticated mathematical model, which provides a set of metrics for objective (mathematical) analysis and evaluation, simulation, optimization, rating, and solution selection. The biological model collects, stores, transcribes, and retrieves genetic information from the FPL. The functionality of the physical-biological model allows to construct and explore physical-biological design spaces of FPL, and to establish their value spaces. Its operationalization occurred as an innovative acting tool in the housing architecture design education system.
{"title":"ARLE GPS: A computational tool to aid architects in spatial planning of house","authors":"Daniel das Neves Martins, A. Jungles, Roberto de Oliveira","doi":"10.4025/actascitechnol.v45i1.62821","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.62821","url":null,"abstract":"The floor plan layout (FPL) is conceptualized as an ill-defined problem, due to the identification and formulation of objectives not being fully clear in the conceptual phase of the design. A solution to this issue is to convert the ill-defined problem into a well-defined problem. That is, to make the problem explicit, already in the initial phase of the design process, so that it readily allows the architects to know the requirements and constraints, to formulate the goals, and to apply solution strategies they can manage while solving the problem. This conversion makes it possible to solve the problem by a scientific method, through mathematical modeling of the decision-making problem, rather than by a drawn method, via sketches. It allows the architect to establish a relationship between design variables and house performance attributes, and to know the limits within which the solution, or solutions, can be found, aiding him in generating optimized solutions. In order to contribute to the solution of this issue, we present the computational tool ARLE GPS (geometric planning solver). The tool acts as a physical-biological model of the FPL of house. The physical model is structured by a sophisticated mathematical model, which provides a set of metrics for objective (mathematical) analysis and evaluation, simulation, optimization, rating, and solution selection. The biological model collects, stores, transcribes, and retrieves genetic information from the FPL. The functionality of the physical-biological model allows to construct and explore physical-biological design spaces of FPL, and to establish their value spaces. Its operationalization occurred as an innovative acting tool in the housing architecture design education system.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81358247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.61034
F. Eugenio, Filipe Rocha Louzada Soares, Jaine Honorato Oliveira da Silva, Régis Ruoso, R. Fantinel
The use of Remotely Piloted Aircraft Systems (RPAS) as Remote Sensing platforms has been gaining more and more applicability in various fields of study, one of them being the agricultural sector. The interest in this technology segment is mainly due to its flexibility to acquire high-resolution data quickly. Data that helps, for example, identify and monitor pests and diseases. Therefore, this work aims to develop a systematic analysis at a global level to assess the evolution of publications over the years and the current state of the art in the use of RPAS technology in monitoring pests and diseases in crops. Twenty-nine scientific articles came from the Web of Science, Scopus, and Google Scholar platforms, identifying the places of origin of publications, agricultural species, platforms, and sensors. China and the United States published most of the works. Multirotor platforms have been more used compared to fixed-wing platforms. RGB (Red, Green, and Blue) and Multispectral sensors totaled 25% and 40.44%, respectively. It is expected that technological advances and RPAS improvement increasingly strengthened the control of pests and diseases in crops, contributing to a greater appreciation of the benefits of this system.
使用遥控飞机系统(RPAS)作为遥感平台在各个研究领域得到越来越多的应用，其中之一是农业部门。对这一技术领域的兴趣主要是由于其快速获取高分辨率数据的灵活性。例如，有助于识别和监测病虫害的数据。因此，这项工作的目的是在全球一级进行系统分析，以评估多年来出版物的演变和利用RPAS技术监测作物病虫害的最新状况。29篇科学文章来自Web of Science、Scopus和Google Scholar平台，确定了出版物的原产地、农业物种、平台和传感器。中国和美国出版了大部分作品。与固定翼平台相比，多旋翼平台的应用越来越广泛。RGB (Red, Green, and Blue)和多光谱传感器占比分别为25%和40.44%。预期技术的进步和区域农业系统的改进日益加强了对作物病虫害的控制，从而使人们更加认识到该系统的好处。
{"title":"Use of remotely piloted aircraft systems in monitoring pest and diseases in agricultural crops: global literature review","authors":"F. Eugenio, Filipe Rocha Louzada Soares, Jaine Honorato Oliveira da Silva, Régis Ruoso, R. Fantinel","doi":"10.4025/actascitechnol.v45i1.61034","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61034","url":null,"abstract":"The use of Remotely Piloted Aircraft Systems (RPAS) as Remote Sensing platforms has been gaining more and more applicability in various fields of study, one of them being the agricultural sector. The interest in this technology segment is mainly due to its flexibility to acquire high-resolution data quickly. Data that helps, for example, identify and monitor pests and diseases. Therefore, this work aims to develop a systematic analysis at a global level to assess the evolution of publications over the years and the current state of the art in the use of RPAS technology in monitoring pests and diseases in crops. Twenty-nine scientific articles came from the Web of Science, Scopus, and Google Scholar platforms, identifying the places of origin of publications, agricultural species, platforms, and sensors. China and the United States published most of the works. Multirotor platforms have been more used compared to fixed-wing platforms. RGB (Red, Green, and Blue) and Multispectral sensors totaled 25% and 40.44%, respectively. It is expected that technological advances and RPAS improvement increasingly strengthened the control of pests and diseases in crops, contributing to a greater appreciation of the benefits of this system.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73195763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.58727
Natalia Assunção Brasil Silva, H. Pitanga, T. Silva, L. Oliveira, Paulo César Emiliano
Latin American countries have common characteristics: increase in automobile use, and decrease in the interest of users for public transport by bus caused by unsustainable urban mobility. Of these, users’ interest in public transport by bus has the most significant potential for sustainable transport changes. Therefore, this paper aimed to understand how the interaction between the importance and satisfaction of users to transport attributes can help promote the increase in the passengers’ transport demand in medium-sized cities of developing countries. The interaction between the users’ stated importance and the users’ satisfaction for automobile and public transport by bus was analyzed regarding attributes of safety, comfort, transport costs, and travel time. The study was performed in the city of Barreiras, state of Bahia, Brazil. Likert scale data analysis used three approaches that set unique importance and satisfaction ratings employed on the graphic tool Importance-Performance Analysis. It was concluded that interaction between the data of importance and satisfaction is effective, reliable, and allows the comparative analysis between the transport attributes, enabling the prioritization of strategies that help the promotion of passenger transport.
{"title":"Interaction between attribute importance and user satisfaction on the promotion of public transport","authors":"Natalia Assunção Brasil Silva, H. Pitanga, T. Silva, L. Oliveira, Paulo César Emiliano","doi":"10.4025/actascitechnol.v45i1.58727","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.58727","url":null,"abstract":"Latin American countries have common characteristics: increase in automobile use, and decrease in the interest of users for public transport by bus caused by unsustainable urban mobility. Of these, users’ interest in public transport by bus has the most significant potential for sustainable transport changes. Therefore, this paper aimed to understand how the interaction between the importance and satisfaction of users to transport attributes can help promote the increase in the passengers’ transport demand in medium-sized cities of developing countries. The interaction between the users’ stated importance and the users’ satisfaction for automobile and public transport by bus was analyzed regarding attributes of safety, comfort, transport costs, and travel time. The study was performed in the city of Barreiras, state of Bahia, Brazil. Likert scale data analysis used three approaches that set unique importance and satisfaction ratings employed on the graphic tool Importance-Performance Analysis. It was concluded that interaction between the data of importance and satisfaction is effective, reliable, and allows the comparative analysis between the transport attributes, enabling the prioritization of strategies that help the promotion of passenger transport.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86799650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.60830
Leonardo Silva Prado de Oliveira, R. D. T. Barreto, F. A. Silva, L. M. D. M. Jorge
Hydrogen gas is an ideal fuel due to its higher calorific value among fuels and minimal environmental impact on their energy applications. However, the high cost around high reactivity, explosion risks and extremely low energy density, make it unfeasible to be used as fuel in large quantities scale. There are some possibilities to circumvent these limitations, including obtaining and converting energy through fuel cells, which is very promising. Research in this field has been summarized in recent decades, motivated by the environmental problems faced due to the dependence on non-renewable energy matrices. From this, this study aimed to improve the steam methanol reforming using CuO/ZnO/Al2O3 catalyst. The catalyst was characterized by atomic absorption spectroscopy, N2 physisorption and XRD. Catalytic tests were carried out in a laboratory scale fixed bed reactor at 300°C, atmospheric pressure and in differential conditions (methanol conversion < 10%); a previous run for catalyst synthesis validation in relation to the results obtained in the literature for the same conditions was evaluated. Subsequently, it was found that the thermal degradation of methanol at 300°C without the presence of the catalyst was negligible, and then operational conditions were established to obtain methanol conversions lower than 10%. Then, the initial deactivation of the catalyst over 31h. Also identifying the stability after 7 h in reaction with average conversion into 9.7% of methanol, showing high stability, in addition to good reproducibility on the part of synthesis in optimal composition. Then, experiments were carried out for the molar ratios 2:1 and 4:1 with methanol conversions of 15.5% and 6.6%, respectively. Note that performing the average of the 4:1 and 2:1 methanol conversion in 14.6% obtained at indicating that the upper boundary molar ratios (4:1) compensates for the conversion reduction in 2:1, achieving a result superior to the reference 3:1.
{"title":"Evaluation of feeding molar rate in mini fixed bed reactor for methanol steam reforming with pre-optimized composition of CuO/ZnO/Al2O3 catalyst","authors":"Leonardo Silva Prado de Oliveira, R. D. T. Barreto, F. A. Silva, L. M. D. M. Jorge","doi":"10.4025/actascitechnol.v45i1.60830","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60830","url":null,"abstract":"Hydrogen gas is an ideal fuel due to its higher calorific value among fuels and minimal environmental impact on their energy applications. However, the high cost around high reactivity, explosion risks and extremely low energy density, make it unfeasible to be used as fuel in large quantities scale. There are some possibilities to circumvent these limitations, including obtaining and converting energy through fuel cells, which is very promising. Research in this field has been summarized in recent decades, motivated by the environmental problems faced due to the dependence on non-renewable energy matrices. From this, this study aimed to improve the steam methanol reforming using CuO/ZnO/Al2O3 catalyst. The catalyst was characterized by atomic absorption spectroscopy, N2 physisorption and XRD. Catalytic tests were carried out in a laboratory scale fixed bed reactor at 300°C, atmospheric pressure and in differential conditions (methanol conversion < 10%); a previous run for catalyst synthesis validation in relation to the results obtained in the literature for the same conditions was evaluated. Subsequently, it was found that the thermal degradation of methanol at 300°C without the presence of the catalyst was negligible, and then operational conditions were established to obtain methanol conversions lower than 10%. Then, the initial deactivation of the catalyst over 31h. Also identifying the stability after 7 h in reaction with average conversion into 9.7% of methanol, showing high stability, in addition to good reproducibility on the part of synthesis in optimal composition. Then, experiments were carried out for the molar ratios 2:1 and 4:1 with methanol conversions of 15.5% and 6.6%, respectively. Note that performing the average of the 4:1 and 2:1 methanol conversion in 14.6% obtained at indicating that the upper boundary molar ratios (4:1) compensates for the conversion reduction in 2:1, achieving a result superior to the reference 3:1.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85979876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.61329
Victor Garcia Figueirôa-Ferreira, Tatiane Borchers, R. A. Ribeiro, R. Fernandes
Amidst the consequences of the SARS-CoV-2 pandemic, the overall trip decrease and public transport modal share contraction pose a critical dilemma towards urban mobility. Through a questionnaire in Brazilian capitals, the present article considered (1) the citizens’ safety perception of urban mobility and public transport before and during the pandemic, (2) an estimated perception of the post-pandemic, (3) perception of safety regarding both traditional and smart measures, and (4) the concern about data use and privacy. Findings indicated an increase in private cars (41%) and ride-sourcing services (442%) use and a decrease in public transport modes during the pandemic, with an expectation of a post-pandemic modal split following the same pattern. According to respondents, most measures implemented resumes to traditional individual ones, without a systemic approach or smart initiatives. About the latter, a contrasting result was obtained, where there is a high safety perception if implemented with a low security perception over data use and privacy. In this sense, operators, public authorities, city planners and users must observe systemic sanitary measures, regulatory laws and transparency over data use and privacy, democratic and inclusive decision-making processes to address urban vulnerabilities and ensure safe public transport during and after the pandemic.
{"title":"Citizens’ perception analysis of public transport and smart technologies in the Brazilian capitals during the SARS-CoV-2 pandemic","authors":"Victor Garcia Figueirôa-Ferreira, Tatiane Borchers, R. A. Ribeiro, R. Fernandes","doi":"10.4025/actascitechnol.v45i1.61329","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61329","url":null,"abstract":"Amidst the consequences of the SARS-CoV-2 pandemic, the overall trip decrease and public transport modal share contraction pose a critical dilemma towards urban mobility. Through a questionnaire in Brazilian capitals, the present article considered (1) the citizens’ safety perception of urban mobility and public transport before and during the pandemic, (2) an estimated perception of the post-pandemic, (3) perception of safety regarding both traditional and smart measures, and (4) the concern about data use and privacy. Findings indicated an increase in private cars (41%) and ride-sourcing services (442%) use and a decrease in public transport modes during the pandemic, with an expectation of a post-pandemic modal split following the same pattern. According to respondents, most measures implemented resumes to traditional individual ones, without a systemic approach or smart initiatives. About the latter, a contrasting result was obtained, where there is a high safety perception if implemented with a low security perception over data use and privacy. In this sense, operators, public authorities, city planners and users must observe systemic sanitary measures, regulatory laws and transparency over data use and privacy, democratic and inclusive decision-making processes to address urban vulnerabilities and ensure safe public transport during and after the pandemic.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82238723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.62882
Caroline Batista Gonçalves Dias, M. R. D. Santos, S. Donato, A. M. Azevedo
The objective was to identify the effect of regulated deficit irrigation on physiological, yield and root descriptors of ‘Tommy Atkins’ mango tree grown in a semi-arid region of Brazil. The work was carried out during two production cycles on an 11-year-old mango orchard. The design was randomized blocks with five treatments and six replications. Irrigation treatments were based on the trees’ development stage: T1, irrigation supplying 100% of the crop evapotranspiration (ETc) in three production stages: fruit set stage (SI), fruit expansion stage (SII), and physiological maturation stage of the fruits (SIII); T2, 50% ETc in SI and 100% ETc in SII and SIII; T3, 100% ETc in SI and SIII and 50% ETc in SII; T4, 100% ETc in SI and SII, and 50% ETc in SIII; and T5, without irrigation in all three stages. Physiological data were measured once per stage. After harvesting the second cycle, roots were collected, following a completely randomized design, with five treatments and three replications, to determine the total root length density. Total or partial water deficit in ‘Tommy Atkins’ mango trees was identified by decreasing transpiration (E) and photosynthesis (A) and increasing leaf temperature (Tleaf). The total root length density is similar in all irrigation strategies up to 1 m horizontal distance and 0.10 m depth. Water deficit applied in the physiological maturation stage improves yield and water use efficiency.
{"title":"Canonical correlation analysis applied to regulated deficit irrigation in ‘Tommy Atkins’ mango trees","authors":"Caroline Batista Gonçalves Dias, M. R. D. Santos, S. Donato, A. M. Azevedo","doi":"10.4025/actascitechnol.v45i1.62882","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.62882","url":null,"abstract":"The objective was to identify the effect of regulated deficit irrigation on physiological, yield and root descriptors of ‘Tommy Atkins’ mango tree grown in a semi-arid region of Brazil. The work was carried out during two production cycles on an 11-year-old mango orchard. The design was randomized blocks with five treatments and six replications. Irrigation treatments were based on the trees’ development stage: T1, irrigation supplying 100% of the crop evapotranspiration (ETc) in three production stages: fruit set stage (SI), fruit expansion stage (SII), and physiological maturation stage of the fruits (SIII); T2, 50% ETc in SI and 100% ETc in SII and SIII; T3, 100% ETc in SI and SIII and 50% ETc in SII; T4, 100% ETc in SI and SII, and 50% ETc in SIII; and T5, without irrigation in all three stages. Physiological data were measured once per stage. After harvesting the second cycle, roots were collected, following a completely randomized design, with five treatments and three replications, to determine the total root length density. Total or partial water deficit in ‘Tommy Atkins’ mango trees was identified by decreasing transpiration (E) and photosynthesis (A) and increasing leaf temperature (Tleaf). The total root length density is similar in all irrigation strategies up to 1 m horizontal distance and 0.10 m depth. Water deficit applied in the physiological maturation stage improves yield and water use efficiency.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75512206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.60621
L. D. Silva, Edgo Jackson Pinto Santiago, Frank Gomes-Silva, Antonio Samuel Alves da Silva, R. Menezes
The Brazilian semi-arid region is recurrently affected by the scarcity of water that marks the landscape as it prints periods of severe drought. Therefore, rainfall in this region greatly influences plant growth in regional hydrological processes that affect droughts or floods. It is of practical interest to assess how changes in rainfall patterns occur to anticipate hydrological dynamics. However, this is not easy as climate change reshapes global hydrology. Thus, assertive forecasting has become rare and imputed estimates of a reasonable degree of uncertainty. The objective of this work was to verify from the mixture of exponential, gamma, beta, log-normal, Weibull, normal, log-logistic, and exponentiated log-logistic distributions, which best fits the monthly rainfall of the state of Pernambuco, Brazil. The data used came from 133 monthly rainfall series (1950 to 2012) distributed over the state of Pernambuco. The Maximum Likelihood Method estimated all parameters. The Kolmogorov-Smirnov adherence test was applied at 5% probability to assess the adjustments. The least rejected distributions in the adherence test were Weibull, gamma, and beta; October presented the smallest number of distributions considered adequate to model monthly rainfall. More than 99% of the rain gauge stations had some adequate probabilistic distribution to model monthly rainfall in March. For most months, except for March, the Weibull distribution was the most suitable for modeling the monthly rainfall in the vast majority of rain gauge stations of Pernambuco.
{"title":"Mixture models of probability distributions applied to rainfall in the state of Pernambuco, Brazil","authors":"L. D. Silva, Edgo Jackson Pinto Santiago, Frank Gomes-Silva, Antonio Samuel Alves da Silva, R. Menezes","doi":"10.4025/actascitechnol.v45i1.60621","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60621","url":null,"abstract":"The Brazilian semi-arid region is recurrently affected by the scarcity of water that marks the landscape as it prints periods of severe drought. Therefore, rainfall in this region greatly influences plant growth in regional hydrological processes that affect droughts or floods. It is of practical interest to assess how changes in rainfall patterns occur to anticipate hydrological dynamics. However, this is not easy as climate change reshapes global hydrology. Thus, assertive forecasting has become rare and imputed estimates of a reasonable degree of uncertainty. The objective of this work was to verify from the mixture of exponential, gamma, beta, log-normal, Weibull, normal, log-logistic, and exponentiated log-logistic distributions, which best fits the monthly rainfall of the state of Pernambuco, Brazil. The data used came from 133 monthly rainfall series (1950 to 2012) distributed over the state of Pernambuco. The Maximum Likelihood Method estimated all parameters. The Kolmogorov-Smirnov adherence test was applied at 5% probability to assess the adjustments. The least rejected distributions in the adherence test were Weibull, gamma, and beta; October presented the smallest number of distributions considered adequate to model monthly rainfall. More than 99% of the rain gauge stations had some adequate probabilistic distribution to model monthly rainfall in March. For most months, except for March, the Weibull distribution was the most suitable for modeling the monthly rainfall in the vast majority of rain gauge stations of Pernambuco.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88183451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-28DOI: 10.4025/actascitechnol.v45i1.61519
Natália Moraes Cordeiro, Frank Gomes-Silva, C. Brito, J. Jale, J. Vasconcelos
Based on the normal distribution, a new generator of continuous distributions is presented using the monotonic functions and , such that and are the baselines. A study of identifiability of the proposed class is exhibited as well as the series expansions for its cumulative distribution function and probability density function. Additionally, some mathematical properties of the class are discussed, namely, the raw moments, the central moments, the moment generating function, the characteristic function, the derivatives of the log-likelihood function, and a study of the support. A numerical analysis comprising a simulation study and an application to real data is presented. Comparisons between the proposed model and other well-known models evince its potentialities and modeling benefits.
{"title":"Normal-tangent-logarithm-(G_1,G_2 ): a class of probabilistic distributions depending on two baselines","authors":"Natália Moraes Cordeiro, Frank Gomes-Silva, C. Brito, J. Jale, J. Vasconcelos","doi":"10.4025/actascitechnol.v45i1.61519","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61519","url":null,"abstract":"Based on the normal distribution, a new generator of continuous distributions is presented using the monotonic functions and , such that and are the baselines. A study of identifiability of the proposed class is exhibited as well as the series expansions for its cumulative distribution function and probability density function. Additionally, some mathematical properties of the class are discussed, namely, the raw moments, the central moments, the moment generating function, the characteristic function, the derivatives of the log-likelihood function, and a study of the support. A numerical analysis comprising a simulation study and an application to real data is presented. Comparisons between the proposed model and other well-known models evince its potentialities and modeling benefits.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89668263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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