cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11350826
title: RETURN MIGRATION TO THE BRAZILIAN SEMI-ARID NORTHERN REGION

description: Abstract In a strict sense, the migrant to return is understood by the individual who left their region of birth, he resided for some time in a different region and with certain time returns to its place of origin. In this context, the objective of this study was to analyze the process of return migration in the municipalities of the northern brazilian semiarid (SemiSet), between the periods 1995/2000 and 2005/2010 and estimate the return flows in the region. This region is composed by 755 municipalities, located above the São Francisco river, in the states of Rio Grande do Norte, Ceará, Paraíba, Pernambuco, Alagoas and Piauí. We used the Demographic Censuses of 2000 and 2010, which adopted the criterion "fixed date" for definition of the returnees. It has been observed that in relation to the region of origin (former residence) of returnees, in the period 1995/2000 predominated the return of individuals from the Southeastern region of the country. In the period 2005/2010, reverses the position between the Southeast and Northeast, with a reduction of 29% of those who came from the East and an increase of 48% between the returned from the own Northeast.
DOI: 10.6084/m9.figshare.11350829.v1
title: Calibration and evaluation of the DSSAT/Canegro model for sugarcane cultivars under irrigation managements

description: ABSTRACT Model calibration is a fundamental factor to obtain high accuracy in the estimation of crop growth and yield. This study aimed to parameterize the genetic and ecotype coefficients of the DSSAT/Canegro model for five sugarcane cultivars kept under three water managements, besides evaluating the accuracy of the model in predicting sugarcane stalk yield, sugar yield and height. Experimental field data were obtained from two years (2016 and 2017) of cultivation at FCAV/Universidade Estadual Paulista, Jaboticabal, SP, Brazil. The cultivars were maintained under supplementary irrigation, deficit irrigation and no irrigation. Data of the supplementary irrigation treatment (without stress) were used for the parameterization of each cultivar. Model accuracy was assessed by Pearson correlation (r), root mean squared error (RMSE), mean bias error (MBE), index of agreement (d) and confidence coefficient (c). The DSSAT/Canegro model is highly accurate in predicting stalk and sugar yields of sugarcane grown under water regimes, presenting itself as a viable alternative in sugarcane yield simulation. For better performance of the DSSAT/Canegro model, it is necessary to parameterize the variables related to the ecotype of the cultivars, besides the specific coefficients of the cultivars.
DOI: 10.6084/m9.figshare.11350832.v1
title: K-NEAREST NEIGHBORS METHOD FOR PREDICTION OF FUEL CONSUMPTION IN TRACTOR-CHISEL PLOW SYSTEMS

description: ABSTRACT Most important farm operations require a significant amount of energy, and this consumes a major portion of the farm's budget. Consequently, analyzing the fuel consumption of agricultural machinery for farm operations of different sizes makes it possible to predict fuel consumption to set an appropriate budget for energy. The main purpose of this study was to determine the ability of the k-nearest neighbors (KNN) algorithm to predict the fuel consumption of tractor–chisel plow systems correctly. A training-set design of 139 points of 173 data points obtained from the literature was utilized, and the remaining 34 data points were applied as a test set. The input parameters were tractor power, plowing width, depth and speed of plowing, soil percentages of sand, silt, and clay, initial soil moisture content, and initial soil bulk density. The predictive power of the KNN method was compared with that of multiple linear regression (MLR), and experimental data were used to determine the predictive power of both methods. The KNN method generated better results than the multiple linear regression method. The test dataset correlation coefficients were 0.817 for the KNN (k = 2) method and 0.422 for the multiple linear regression method. This study suggests that the KNN method with k = 2 (two nearest neighbors) is suitable for estimating the fuel consumption of tractor–chisel plow systems for input values within the studied range.
DOI: 10.6084/m9.figshare.11350814
title: MAPPING THE STUDENTS WRITING OF FUNDAMENTAL EDUCATION STUDENTS: IN FOCUS THE ARTICLE OF OPINION

description: ABSTRACT In this work, we seek to analyze the recurrent linguistic-discursive characteristics in opinion articles produced by basic education students. As a theoretical contribution to the analysis of the corpus, we start from the notion of Socio-rhetorical genre (MILLLER, 1984, 2014; BAZERMAN, 2011a; 2011b; 2015), from Swales (1990) theoretical-methodological principles and from the concepts of Systemic-Functional Grammar (SFG) (HALLYDAY; MATTHIESSEN, 2014). The research corpus is made up of 59 opinion articles produced by students of the 9th grade of Elementary School in the classroom context. The results of the analysis indicate that the rhetorical structure of the opinion article produced by these students presents typical movements and steps of the communicative situation of production of the texts. We verified that the articles of opinion written by the students present the following movements: 1 - Contextualization; 2 - Thesis presentation; 3 - Thesis defense; 4 - Synthesis and reiteration. Quantifying the data, we found that students use Movements 2 and 3 more frequently. The analysis of ideational meanings has shown that students use material processes associated with generic names participants to indicate facts and actions, identify and attribute characteristics to text field, semiotic object or semiotic abstraction through relational processes, and position themselves using personal pronouns participants associated with relational processes. The analysis of interpersonal resources indicated that, among these resources, students predominantly use modal verbs and expressions and comment adjuncts. The findings can foster the production of didactic materials that emphasize didactic activities that assist young writers in their writing practice in a situated way.
DOI: 10.6084/m9.figshare.11350817
title: Liquid-liquid equilibria in aqueous two-phase ethanol/salt systems at different temperatures and their application to anthocyanins extraction

description: Abstract Aqueous two-phase systems (ATPS) are formed by mixtures of chemical species that, under certain conditions, separate into two immiscible phases, with water as the major component in global terms and, at lower concentrations, polymers, salts, ionic liquids and alcohols, depending on the system type. Different parameters influence ATPS equilibrium such as temperature, alcohol carbon chain size, salt type, pH, etc. The present work aimed to obtain the binodal curves for ATPS made up of ethanol, sodium citrate/ammonium sulfate and water at different temperatures (15, 25 and 35 °C) as well as to evaluate the potential of the ethanol/ammonium sulfate system in anthocyanins partition. The results showed that the increase in temperature did not alter the biphasic region in the temperature range investigated, not influencing the formation of phases. Nonlinear equations were satisfactorily fitted to binodal curves data, except for sodium citrate-containing ATPS at 15 °C. Higher concentration of the overall mixture resulted in longer tie-line of ammonium sulphate-containing ATPS. Higher values of partition coefficient and recovery yield of Syzygium cumini fruit anthocyanins were obtained at longer tie-lines.
DOI: 10.6084/m9.figshare.11350820.v1
title: THE GAMIFIED WRITING OF FANFICTIONS WITH DIGITAL TECHNOLOGIES IN AN ENGLISH CLUB

description: ABSTRACT This study aims to understand relationships between school literacy practices and the gamified writing of fanfictions with the support of Digital Technologies (DT). The fanfictions are fictional stories written by fans based on an original product. They have become popular with the spread of the internet, especially among school-age teens. The justification for the development of reading and writing practices with the genre fanfiction, in this study, is based on a socio-cultural perspective of the literacy studies, in which the focus on learning a genre is not just in the assimilation of its structure, but in the ways in which the learning of a genre affords knowledge in particular ways. Mediations surrounding fanfictions took place in the context of an English Club with five subjects. The data come from statements of these subjects on the Classcraft gamification platform, from the fanfiction written during the Club classes and from a focus group performed with these subjects. In order to proceed with the analyzes, we constructed a timeline showing the relationship of the subjects with the fanfictions before the activities developed in the Club, the approximations, interactions and positioning during their writing trajectory and their perceptions about how the activities involving the genre from the use of different methodological approaches, after the writing practice of fanfiction. The results point mainly to the insertion of these subjects, as insiders, in different literacy practices involving the reading and writing of the genre fanfiction, mediated by the uses of DT. Furthermore, there are indications that the gamification allowed the subjects to evidence singular ways of positioning themselves in relation to reading, writing and different ways of being, acting and creating meanings in the school context.
DOI: 10.6084/m9.figshare.11350811
title: Building condition assessment: adjustments of the Building Performance Indicator (BPI) for university buildings in Brazil

description: Abstract The Building Performance Indicator (BPI), not fully applied in Brazil, expresses objectively the overall condition of a building based on the performance assessment of the building systems that comprise it. Although BPI was originally developed for hospital facilities, it can be used in different types of buildings since its methodology is generic. The objective of the study is to adjust the BPI to allow its application in the maintenance management of Brazilian university buildings. The stages of the research consist of (1) adjusting the factors and criteria that comprise the BPI; (2) implementing the adapted BPI; and (3) verifying its utility and ease of use. The adjustment and implementation included a building for classrooms and another that houses a teaching and research laboratory, both located at University X. The results obtained allowed the comparison of the overall condition between the inspected buildings, which establishes the intervention priority helping to adopt the most adequate maintenance strategy.
DOI: 10.6084/m9.figshare.11350817.v1
title: Liquid-liquid equilibria in aqueous two-phase ethanol/salt systems at different temperatures and their application to anthocyanins extraction

description: Abstract Aqueous two-phase systems (ATPS) are formed by mixtures of chemical species that, under certain conditions, separate into two immiscible phases, with water as the major component in global terms and, at lower concentrations, polymers, salts, ionic liquids and alcohols, depending on the system type. Different parameters influence ATPS equilibrium such as temperature, alcohol carbon chain size, salt type, pH, etc. The present work aimed to obtain the binodal curves for ATPS made up of ethanol, sodium citrate/ammonium sulfate and water at different temperatures (15, 25 and 35 °C) as well as to evaluate the potential of the ethanol/ammonium sulfate system in anthocyanins partition. The results showed that the increase in temperature did not alter the biphasic region in the temperature range investigated, not influencing the formation of phases. Nonlinear equations were satisfactorily fitted to binodal curves data, except for sodium citrate-containing ATPS at 15 °C. Higher concentration of the overall mixture resulted in longer tie-line of ammonium sulphate-containing ATPS. Higher values of partition coefficient and recovery yield of Syzygium cumini fruit anthocyanins were obtained at longer tie-lines.
DOI: 10.6084/m9.figshare.11350826.v1
title: RETURN MIGRATION TO THE BRAZILIAN SEMI-ARID NORTHERN REGION

description: Abstract In a strict sense, the migrant to return is understood by the individual who left their region of birth, he resided for some time in a different region and with certain time returns to its place of origin. In this context, the objective of this study was to analyze the process of return migration in the municipalities of the northern brazilian semiarid (SemiSet), between the periods 1995/2000 and 2005/2010 and estimate the return flows in the region. This region is composed by 755 municipalities, located above the São Francisco river, in the states of Rio Grande do Norte, Ceará, Paraíba, Pernambuco, Alagoas and Piauí. We used the Demographic Censuses of 2000 and 2010, which adopted the criterion "fixed date" for definition of the returnees. It has been observed that in relation to the region of origin (former residence) of returnees, in the period 1995/2000 predominated the return of individuals from the Southeastern region of the country. In the period 2005/2010, reverses the position between the Southeast and Northeast, with a reduction of 29% of those who came from the East and an increase of 48% between the returned from the own Northeast.
DOI: 10.6084/m9.figshare.11350805
title: INTERNATIONAL DIVISION OF KNOWLEDGE AND THE DECLINE OF HUMAN SCIENCES: THE SCENARIO OF PRIVATE INSTITUTIONS OF HIGHER EDUCATION IN THE NORTHEAST OF BRAZIL

description: ABSTRACT This article aims to analyze the scenario of the offer of undergraduate courses by professional training area of private higher education institutions in the Northeast region of Brazil and its correlation with the conditions of the knowledge economy. In order to obtain a clear idea about the quantitative universe of the courses offered, we used the database on higher education institutions and e-MEC undergraduate courses. We found that Brazilian higher education experiences a prominence of the private sector, as well as the predominance of the offer of higher education courses centered on profitable areas for capitalist accumulation, and the consequent subalternization of human sciences due to the submission of education to economism linked to the globalization movement and the emergence of the knowledge economy.
DOI: 10.6084/m9.figshare.11350802
title: SUCROSE CRYSTALLIZATION: MODELING AND EVALUATION OF PRODUCTION RESPONSES TO TYPICAL PROCESS FLUCTUATIONS

description: Abstract This work describes a phenomenological model of the two-massecuite system for sucrose crystallization, developed using EMSO software. In most Brazilian sugarcane industries, sucrose crystallization is performed using this system. This process is considered to be a fundamental step in obtaining sugar of the desired quality and accounts for a substantial fraction of the production costs. The simulation results - crystal percentage in massecuite, brix and purity of molasses, magma purity, sugar pol, crystal size distribution - were validated by comparing them with real process data of an industrial plant. The interest of the phenomenological model to study the possible impacts of impurities and process instability was illustrated by varying the simulation inputs related with the syrup purity, syrup brix and steam conditions.
DOI: 10.6084/m9.figshare.11350811.v1
title: Building condition assessment: adjustments of the Building Performance Indicator (BPI) for university buildings in Brazil

description: Abstract The Building Performance Indicator (BPI), not fully applied in Brazil, expresses objectively the overall condition of a building based on the performance assessment of the building systems that comprise it. Although BPI was originally developed for hospital facilities, it can be used in different types of buildings since its methodology is generic. The objective of the study is to adjust the BPI to allow its application in the maintenance management of Brazilian university buildings. The stages of the research consist of (1) adjusting the factors and criteria that comprise the BPI; (2) implementing the adapted BPI; and (3) verifying its utility and ease of use. The adjustment and implementation included a building for classrooms and another that houses a teaching and research laboratory, both located at University X. The results obtained allowed the comparison of the overall condition between the inspected buildings, which establishes the intervention priority helping to adopt the most adequate maintenance strategy.
DOI: 10.6084/m9.figshare.11350814.v1
title: MAPPING THE STUDENTS WRITING OF FUNDAMENTAL EDUCATION STUDENTS: IN FOCUS THE ARTICLE OF OPINION

description: ABSTRACT In this work, we seek to analyze the recurrent linguistic-discursive characteristics in opinion articles produced by basic education students. As a theoretical contribution to the analysis of the corpus, we start from the notion of Socio-rhetorical genre (MILLLER, 1984, 2014; BAZERMAN, 2011a; 2011b; 2015), from Swales (1990) theoretical-methodological principles and from the concepts of Systemic-Functional Grammar (SFG) (HALLYDAY; MATTHIESSEN, 2014). The research corpus is made up of 59 opinion articles produced by students of the 9th grade of Elementary School in the classroom context. The results of the analysis indicate that the rhetorical structure of the opinion article produced by these students presents typical movements and steps of the communicative situation of production of the texts. We verified that the articles of opinion written by the students present the following movements: 1 - Contextualization; 2 - Thesis presentation; 3 - Thesis defense; 4 - Synthesis and reiteration. Quantifying the data, we found that students use Movements 2 and 3 more frequently. The analysis of ideational meanings has shown that students use material processes associated with generic names participants to indicate facts and actions, identify and attribute characteristics to text field, semiotic object or semiotic abstraction through relational processes, and position themselves using personal pronouns participants associated with relational processes. The analysis of interpersonal resources indicated that, among these resources, students predominantly use modal verbs and expressions and comment adjuncts. The findings can foster the production of didactic materials that emphasize didactic activities that assist young writers in their writing practice in a situated way.
DOI: 10.6084/m9.figshare.11350799
title: Treatment of bilateral popliteal artery aneurysms

description: Abstract Popliteal artery aneurysms are the most frequent type of peripheral aneurysm, accounting for 85% of the all of these aneurysms. Usually asymptomatic, they are generally diagnosed during clinical examination. Incidence is higher among males and seniors. They are bilateral in 50% of the cases and 60% are associated with abdominal aortic aneurysms. This paper describes a 72-year-old male patient who presented with two bilateral pulsatile masses, one in each popliteal region, was otherwise asymptomatic, and had a history of hypertension and dyslipidemia. Clinical examination and ultrasound imaging confirmed a diagnosis of bilateral aneurysms of the popliteal arteries. Popliteal artery aneurysms can be treated with open bypass surgery, with or without aneurysm resection, or with endovascular surgery. This Therapeutic Challenge discusses these possibilities.
DOI: 10.6084/m9.figshare.11350793
title: INVESTIGATION OF THE EFFECT OF ELECTRIC FIELD ON CO2 ABSORPTION IN WATER/Fe3O4 NANOFLUID

description: Abstract In this study, a novel strategy for controlling the mass transfer rate in a gas-liquid system was reported and used for the industrially important system of CO2 absorption. The strategy used Fe3O4 nanoparticles in the liquid phase and also exerting an external electric field. To demonstrate this approach, a unique experimental set up was applied to form a falling liquid film, which was water, to be in contact with the gas phase, which was pure carbon dioxide. Nanofluid with concentrations less than 0.03% by volume and field intensities of 133, 200, 266 kV/m were used in this study. Experimental results showed that the external electric field was able to remarkably enhance the gas absorption rate in dilute nanofluids, while it deteriorated mass transfer in concentrated nanofluids. In order to explain the results, the viscosity of the nanofluid was also experimentally measured in the presence of the electric field.
DOI: 10.6084/m9.figshare.11350796
title: INFLUENCE OF HYDRAULIC RETENTION TIME ON HYDROGEN PRODUCTION BY TREATING CHEESE WHEY WASTEWATER IN ANAEROBIC FLUIDIZED BED BIOREACTOR - AN APPROACH FOR DEVELOPING COUNTRIES

description: Abstract This study assessed the effect of hydraulic retention time (HRT) on biohydrogen production by dark fermentation using an anaerobic fluidized bed reactor fed with cheese whey synthetic wastewater. The reactor of 1.2 L was operated with an approximate carbohydrate concentration of 2800 mg L-1, and HRTs of 6, 4, 2, 1 and 0.5 h. Acetic and butyric acids were the main metabolites produced in the reactor. The hydrogen production increased from 0.039 to 1.43 L-H2 h-1 L-1-reactor as the HRT decreased from 6 to 0.5 h. The best hydrogen yield (HY) (2.73 mol-H2 mol-carbohydrate-1) and carbohydrate consumption (81.02%) were achieved at a HRT of 6 h (12.34 kg-COD m-3 d-1) followed by the HY of 2.43 mol-H2 mol-carbohydrate-1 at a HRT of 0.5h (163.02 kg-COD m-3.d-1). An increase in the influent pH in the operational phase 05 (HRT of 0.5 h) favored hydrogen production despite the reduced carbohydrate conversion compared to phase 01 (HRT of 6 h). In both conditions, the reactor presented the highest amount of acetic acid, indicating that the acetate route favored the hydrogen yield production. The HRT reduction led to an increase in microbial diversity, as evidenced by the Shannon-Wiener coefficient of 2.586, which corresponds to the operational phase with a HRT of 2 h.
DOI: 10.6084/m9.figshare.11350802.v1
title: SUCROSE CRYSTALLIZATION: MODELING AND EVALUATION OF PRODUCTION RESPONSES TO TYPICAL PROCESS FLUCTUATIONS

description: Abstract This work describes a phenomenological model of the two-massecuite system for sucrose crystallization, developed using EMSO software. In most Brazilian sugarcane industries, sucrose crystallization is performed using this system. This process is considered to be a fundamental step in obtaining sugar of the desired quality and accounts for a substantial fraction of the production costs. The simulation results - crystal percentage in massecuite, brix and purity of molasses, magma purity, sugar pol, crystal size distribution - were validated by comparing them with real process data of an industrial plant. The interest of the phenomenological model to study the possible impacts of impurities and process instability was illustrated by varying the simulation inputs related with the syrup purity, syrup brix and steam conditions.