cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.6857330.v1
title: Synthesis and characterization of iron photocatalysts supported on microporous zeolites

description: ABSTRACT ZSM11 and BETA zeolitic materials were synthesized by the hydrothermal method and were further impregnated with a 6 wt% of iron and characterized by different physicochemical techniques in order to be employed in the photocatalytic degradation of methyl orange (MO). Matrices structures and crystallinity were verified by X Ray Diffraction (XRD) and Fourier Transformed Infrared Spectroscopy (FTIR), even for modified zeolites. XRD patterns showed the characteristic signals at 2θ=7, 9, 23 and 24° for ZSM11 matrix, and 2θ= 7-8° and 21- 22°, for BETA. According to BET results, specific surface area were 392 m2/g for ZSM11 and 585 m2/g for BETA. In both cases, an area reduction with metal incorporation were obtained. Iron con-tent was confirmed by Atomic Absorption (AA) spectroscopy, finding similar values than the theoretical ones. Additionaly, iron signals (0,5 y 6,5 KeV) were detected by SEM EDX. Band gap energies of the materials were calculated employing Diffuse Reflectance Spectroscopy- UVvis (DRS-UVvis), obtaining similar values than α-Fe2O3. A reduction of the band gap energy in comparison with the correspondent material was also found by this technique. The materials were further evaluated as catalysts for MO photodegradation obtaining a 96 % and 56% of degradation for Fe-ZSM11 and Fe-BETA, respectively.
DOI: 10.6084/m9.figshare.6857321
title: Parametrization of Models and Use of Estimated Global Solar Radiation Data in the Irrigated Rice Yield Simulation

description: Abstract The objective of this study was to evaluate the use of estimated global solar radiation data in the simulations of potential yield of irrigated rice. Global solar radiation was estimated by four empirical models, based on air temperature, and a meteorological satellite derivated. The empirical models were calibrated and validated for 10 sites, representative of the six rice regions of the State of Rio Grande do Sul - Brazil. To evaluate the impact of the radiation estimates on irrigated rice yield simulations, the CERES-Rice model, calibrated for four cultivars, was used. The estimates of global solar radiation of the empirical models based on the air temperature showed deviations, from the observed values, of 20 to 30% and the estimated by satellite deviations of more than 30%. The global solar radiation data estimated by the Hargreaves and Samani, Donatelli and Campbell and derived satellite (PowerNasa) type air temperature-based empirical models can be used as input data in simulation models of crop growth, development and productivity of irrigated rice.
DOI: 10.6084/m9.figshare.6857324
title: Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel

description: ABSTRACT In this work the reversion of the strain-induced ?’-martensite to ?’-austenite was studied in a series of AISI 316 stainless steels (SS) specimens. The samples were submitted to 63% reduction in thickness by rolling at a temperature of -70ºC, to achieve high martensite content. The reversion of martensite to austenite was made by means of isochronic, isothermal heat treatments at temperatures between 200 and 900ºC, so as to induce partial martensite-austenite phase transformation. The samples were studied by optical and electronic microscopy, X-ray diffraction, magnetization measurements, microhardness, and electromagnetic non destructive methods: feritscope, conductivity measurements using Van der Pauw’s technique, and magnetic permeability assessments by an eddy current inverse method. The metalography study showed an ?’ lath martensite type structure and a similar one for the reverted austenite (?’). Magnetization measurements and magnetic permeability showed that the reversion is active between 400 and 800°C. From the magnetic saturation measurements, a new calibration curve for the assessment of %?’ through the feritscope readings was obtained. The results of the different techniques were com-pared, in order to assess the scope of the studied techniques in the characterization of rolled SS products, and in the evaluation of progress of reversion reaction.
DOI: 10.6084/m9.figshare.6857327.v1
title: Surface Integrity Analisys in the Hard Turning of Cemented Steel AISI 4317

description: This work was based on the surface integrity analysis of hardened steel, AISI 4317 case carburized, quenched and tempered with 58 HRC, obtained by a turning operation executed with CBN (cubic boron nitride) tool, varying three basic cutting parameters (cutting speed, feed rate and cutting depth). The surface integrity characterization was conducted analyzing the behavior of the surface roughness Ra, residual stresses and with layer presence after turning. Also, the cutting forces were measured. The experimental planning used was a central composite design. The results and data were statistically treated by the Statistica software, enabling the generation of a mathematical model, relating the dependent variables with the independent variables. The roughness values Ra obtained after the experiments ranged from 0.31 to 2.8 µm, providing an indication that is possible to replace grinding process by hard turning using CBN tools that could reduce machining time and costs. The hard turning process generated compressive residual stresses profiles and white layer formation, from 1.1 to 5.1 µm, on the surface of the samples. The penetration force showed the highest values for the turning forces measurements. The lowest values for the cutting parameters represented the optimized surface integrity of the AISI 4317 steel.
DOI: 10.6084/m9.figshare.6857324.v1
title: Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel

description: ABSTRACT In this work the reversion of the strain-induced ?’-martensite to ?’-austenite was studied in a series of AISI 316 stainless steels (SS) specimens. The samples were submitted to 63% reduction in thickness by rolling at a temperature of -70ºC, to achieve high martensite content. The reversion of martensite to austenite was made by means of isochronic, isothermal heat treatments at temperatures between 200 and 900ºC, so as to induce partial martensite-austenite phase transformation. The samples were studied by optical and electronic microscopy, X-ray diffraction, magnetization measurements, microhardness, and electromagnetic non destructive methods: feritscope, conductivity measurements using Van der Pauw’s technique, and magnetic permeability assessments by an eddy current inverse method. The metalography study showed an ?’ lath martensite type structure and a similar one for the reverted austenite (?’). Magnetization measurements and magnetic permeability showed that the reversion is active between 400 and 800°C. From the magnetic saturation measurements, a new calibration curve for the assessment of %?’ through the feritscope readings was obtained. The results of the different techniques were com-pared, in order to assess the scope of the studied techniques in the characterization of rolled SS products, and in the evaluation of progress of reversion reaction.
DOI: 10.6084/m9.figshare.6857321.v1
title: Parametrization of Models and Use of Estimated Global Solar Radiation Data in the Irrigated Rice Yield Simulation

description: Abstract The objective of this study was to evaluate the use of estimated global solar radiation data in the simulations of potential yield of irrigated rice. Global solar radiation was estimated by four empirical models, based on air temperature, and a meteorological satellite derivated. The empirical models were calibrated and validated for 10 sites, representative of the six rice regions of the State of Rio Grande do Sul - Brazil. To evaluate the impact of the radiation estimates on irrigated rice yield simulations, the CERES-Rice model, calibrated for four cultivars, was used. The estimates of global solar radiation of the empirical models based on the air temperature showed deviations, from the observed values, of 20 to 30% and the estimated by satellite deviations of more than 30%. The global solar radiation data estimated by the Hargreaves and Samani, Donatelli and Campbell and derived satellite (PowerNasa) type air temperature-based empirical models can be used as input data in simulation models of crop growth, development and productivity of irrigated rice.
DOI: 10.6084/m9.figshare.6857312
title: Nitrogen fertilization to attenuate the damages caused by salinity on yellow passion fruit seedlings

description: ABSTRACT The study aimed to evaluate the mitigating effect of nitrogen (N) on the damages caused by irrigation water salinity, in the production of yellow passion fruit seedlings. A randomized block design in split plots was used, with five levels of irrigation water salinity (plot) (0.3, 1.0, 1.7, 2.4 and 3.1 dS m-1) and five doses of N fertilization (sub-plot) (180, 240, 300, 360 and 420 mg of N dm-3), with five replicates, totaling 125 experimental units, with one plant per plot. The seedlings were produced in 3.780 mL tubes, used as drainage lysimeter, which received a daily irrigation depth based on water balance. Growth and contents of chlorophyll and carotenoids were evaluated at 85 days after sowing. The increase in irrigation water salinity reduced stem diameter, plant height, number of leaves, chlorophyll a, chlorophyll b and total chlorophyll; increasing N doses also led to linear decline in stem diameter and plant height. Application of increasing doses of N did not attenuate the effect of salinity on growth and pigment contents.
DOI: 10.6084/m9.figshare.6857309
title: FEMINISMS BEYOND FEMINISMS: CRITICAL ETHOS AND THOUGHT TRANSFORMATION

description: ABSTRACT: In this article, rather than discussing feminisms as a form of political activism, we aim to problematize them as a radical critic to the subjugation relationships we have established with the truths of our time. To this end, we discussed two works by the Japanese artist Yasumasa Morimura, insofar as we found resonance points between these images and some of the assumptions of what we call critical feminist ethos in its ability to tighten, in a decisive manner, what we are in the gender binary order.
DOI: 10.6084/m9.figshare.6857312.v1
title: Nitrogen fertilization to attenuate the damages caused by salinity on yellow passion fruit seedlings

description: ABSTRACT The study aimed to evaluate the mitigating effect of nitrogen (N) on the damages caused by irrigation water salinity, in the production of yellow passion fruit seedlings. A randomized block design in split plots was used, with five levels of irrigation water salinity (plot) (0.3, 1.0, 1.7, 2.4 and 3.1 dS m-1) and five doses of N fertilization (sub-plot) (180, 240, 300, 360 and 420 mg of N dm-3), with five replicates, totaling 125 experimental units, with one plant per plot. The seedlings were produced in 3.780 mL tubes, used as drainage lysimeter, which received a daily irrigation depth based on water balance. Growth and contents of chlorophyll and carotenoids were evaluated at 85 days after sowing. The increase in irrigation water salinity reduced stem diameter, plant height, number of leaves, chlorophyll a, chlorophyll b and total chlorophyll; increasing N doses also led to linear decline in stem diameter and plant height. Application of increasing doses of N did not attenuate the effect of salinity on growth and pigment contents.
DOI: 10.6084/m9.figshare.6857309.v1
title: FEMINISMS BEYOND FEMINISMS: CRITICAL ETHOS AND THOUGHT TRANSFORMATION

description: ABSTRACT: In this article, rather than discussing feminisms as a form of political activism, we aim to problematize them as a radical critic to the subjugation relationships we have established with the truths of our time. To this end, we discussed two works by the Japanese artist Yasumasa Morimura, insofar as we found resonance points between these images and some of the assumptions of what we call critical feminist ethos in its ability to tighten, in a decisive manner, what we are in the gender binary order.
DOI: 10.6084/m9.figshare.6857300
title: YOUTH AND WRITING: IN-SCHOOL AND OUT OF SCHOOL PRACTICES IN PORTUGAL

description: ABSTRACT: We present writing practices within curricular (requested by teachers) and extra-curricular (free initiative) contexts by students (ages 9-15), attending Basic Education in Portugal; data was collected by means of a national survey. These practices express a vast and dynamic relationship with writing that is (re)constructed by the individuals. Indeed, the Didactics of Writing has highlighted the necessity to understand the personal relationship that individuals (re)create with the act of writing in a more profound manner, for it contains their motivations or detachment factors that have led them to reject the practice of written verbal production. The results show a greater diversity of out of school practices that contrast with focused in-school writing practices designed to prioritize teaching-learning goals. Nevertheless, we note connecting elements between the two contexts that inform a more favourable didactic approach towards a more significant path between the individuals and writing.
DOI: 10.6084/m9.figshare.6857297
title: THE ANALYSIS OF DISCURSIVE INTERACTIONS IN SCIENCE LESSONS: BROADENING METHODOLOGICAL PERSPECTIVES IN ARGUMENTATION RESEARCH

description: ABSTRACT: We discuss the potential of Ethnography in Education to analyze discursive interactions in science lessons. One of the challenges of Science Education research is to shift the studies from a prescriptive/evaluative approach to a descriptive/procedural view of argumentation in classroom. We present a research design developed around three interdependent axes to analyze discursive interactions in an Elementary School’s 3rd grade class. The results indicate that considering the form of discourse, not just its content, has generated insights into what it means to argue from the perspective of students and teacher themselves. In addition, historical connections of the daily life of the class in contrast to contexts of different time-space dimensions provided a multifaceted analysis of the learning processes under construction.
DOI: 10.6084/m9.figshare.6857300.v1
title: YOUTH AND WRITING: IN-SCHOOL AND OUT OF SCHOOL PRACTICES IN PORTUGAL

description: ABSTRACT: We present writing practices within curricular (requested by teachers) and extra-curricular (free initiative) contexts by students (ages 9-15), attending Basic Education in Portugal; data was collected by means of a national survey. These practices express a vast and dynamic relationship with writing that is (re)constructed by the individuals. Indeed, the Didactics of Writing has highlighted the necessity to understand the personal relationship that individuals (re)create with the act of writing in a more profound manner, for it contains their motivations or detachment factors that have led them to reject the practice of written verbal production. The results show a greater diversity of out of school practices that contrast with focused in-school writing practices designed to prioritize teaching-learning goals. Nevertheless, we note connecting elements between the two contexts that inform a more favourable didactic approach towards a more significant path between the individuals and writing.
DOI: 10.6084/m9.figshare.6857297.v1
title: THE ANALYSIS OF DISCURSIVE INTERACTIONS IN SCIENCE LESSONS: BROADENING METHODOLOGICAL PERSPECTIVES IN ARGUMENTATION RESEARCH

description: ABSTRACT: We discuss the potential of Ethnography in Education to analyze discursive interactions in science lessons. One of the challenges of Science Education research is to shift the studies from a prescriptive/evaluative approach to a descriptive/procedural view of argumentation in classroom. We present a research design developed around three interdependent axes to analyze discursive interactions in an Elementary School’s 3rd grade class. The results indicate that considering the form of discourse, not just its content, has generated insights into what it means to argue from the perspective of students and teacher themselves. In addition, historical connections of the daily life of the class in contrast to contexts of different time-space dimensions provided a multifaceted analysis of the learning processes under construction.
DOI: 10.6084/m9.figshare.6857291
title: MATHEMATICS TEACHERS’ IDENTITY DEVELOPMENT IN THE CONTEXT OF PROFESSIONAL MASTER’S DEGREES

description: ABSTRACT: Nowadays, Professional Masters’ Degrees are important formative initiatives for teachers. This study reports results from an ongoing qualitative research project aiming at describing how participation in a Professional Master’s Degree contributes to the development of mathematics teachers’ professional identities. By adopting a socio-cultural perspective, we employed the notions of figured worlds and space of authoring as theoretical tools to analyze a Professional Master’s Degree and to develop an interpretative case study centered on André, a mathematics teacher who graduated from such program. The results reveal that the degree is a figured world focused mainly on disciplinary academic knowledge. André’s case reveals the difficulties experienced by the teacher when he tried to produce self-understandings about himself as a mathematics teacher articulating the voices and discourses coming from the master’s degree with those coming from his teaching practice.The results reveal that the studied professional master is a figurative world, concerned about developing teaching learnings centered in academic mathematics. André’s case shows some difficulties lived by the teacher when he tried to produce understandings about himself as a math teacher that articulate discourses and voices coming from the master with his own professional practice in school.
DOI: 10.6084/m9.figshare.6857291.v1
title: MATHEMATICS TEACHERS’ IDENTITY DEVELOPMENT IN THE CONTEXT OF PROFESSIONAL MASTER’S DEGREES

description: ABSTRACT: Nowadays, Professional Masters’ Degrees are important formative initiatives for teachers. This study reports results from an ongoing qualitative research project aiming at describing how participation in a Professional Master’s Degree contributes to the development of mathematics teachers’ professional identities. By adopting a socio-cultural perspective, we employed the notions of figured worlds and space of authoring as theoretical tools to analyze a Professional Master’s Degree and to develop an interpretative case study centered on André, a mathematics teacher who graduated from such program. The results reveal that the degree is a figured world focused mainly on disciplinary academic knowledge. André’s case reveals the difficulties experienced by the teacher when he tried to produce self-understandings about himself as a mathematics teacher articulating the voices and discourses coming from the master’s degree with those coming from his teaching practice.The results reveal that the studied professional master is a figurative world, concerned about developing teaching learnings centered in academic mathematics. André’s case shows some difficulties lived by the teacher when he tried to produce understandings about himself as a math teacher that articulate discourses and voices coming from the master with his own professional practice in school.
DOI: 10.6084/m9.figshare.6857288
title: Advantage in muscle activation in gait with support of body weight in spinal cord injury

description: Abstract Introduction: The locomotor training with body weight support has been proposed as an alternative for the rehabilitation of people with spinal cord injury, in order to develop most of the residual potential of the body. Objective: To compare the levels of muscle activation of the main muscle involved in gait during body weight-supported treadmill training and body weight-supported overground training in incomplete spinal cord injured patients. Methods: It was a prospective cross-sectional study, in which 11 incomplete injured patients were submitted to two modalities of gait with body weight support, the first one on the treadmill (two different speeds: 1 and 4km/h), and the second one with the walker on fixed floor. The electromyographical acquisition was done in the rectus femoris (RF), vastus medialis (VM), vastus lateralis (VL) and gluteus maximus (GM). Results: There was a greater muscle activation of all muscles analyzed in the treadmill training as compared to the over groundtraining, both at 4 km/h (RF: p=0.00), (VM: p=0.00), (VL: p=0.00) e (GM: p=0.00) and at 1km/h (RF: p=0.00), (VM: p=0.00), (VL: p=0.00) e (GM: p=0.00). When comparing the two modalities of treadmill training, at 4 and 1km/h, there was no statically significant difference between them (RF: p=0.36), (VM: p=1.00), (VL: p=1.00) e (GM: p=0.16). Conclusion: The gait training with body weight support is more effective in activating the muscles involved in the gait training on treadmill compared to overground training in patients with incomplete spinal cord injury.
DOI: 10.6084/m9.figshare.6857285
title: Taxonomic study of Abuta (Menispermaceae) in the state of Acre, Brazil

description: Abstract A taxonomic treatment of Abuta in the Acre state is presented. Botanical specimens from national and foreign herbaria, as well as 17 new collections and the literature, were analyzed. The genus is represented by eight species: Abuta barbata, A. brevifolia, A. grandifolia, A. obovata, A. pahnii, A. rufescens, A. Sandwithiana and A. solimoesensis. Identification keys, descriptions, and illustrations of the species are presented, as well as data concerning geographical distribution and additional comments of the species.
DOI: 10.6084/m9.figshare.6857285.v1
title: Taxonomic study of Abuta (Menispermaceae) in the state of Acre, Brazil

description: Abstract A taxonomic treatment of Abuta in the Acre state is presented. Botanical specimens from national and foreign herbaria, as well as 17 new collections and the literature, were analyzed. The genus is represented by eight species: Abuta barbata, A. brevifolia, A. grandifolia, A. obovata, A. pahnii, A. rufescens, A. Sandwithiana and A. solimoesensis. Identification keys, descriptions, and illustrations of the species are presented, as well as data concerning geographical distribution and additional comments of the species.
DOI: 10.6084/m9.figshare.6857288.v1
title: Advantage in muscle activation in gait with support of body weight in spinal cord injury

description: Abstract Introduction: The locomotor training with body weight support has been proposed as an alternative for the rehabilitation of people with spinal cord injury, in order to develop most of the residual potential of the body. Objective: To compare the levels of muscle activation of the main muscle involved in gait during body weight-supported treadmill training and body weight-supported overground training in incomplete spinal cord injured patients. Methods: It was a prospective cross-sectional study, in which 11 incomplete injured patients were submitted to two modalities of gait with body weight support, the first one on the treadmill (two different speeds: 1 and 4km/h), and the second one with the walker on fixed floor. The electromyographical acquisition was done in the rectus femoris (RF), vastus medialis (VM), vastus lateralis (VL) and gluteus maximus (GM). Results: There was a greater muscle activation of all muscles analyzed in the treadmill training as compared to the over groundtraining, both at 4 km/h (RF: p=0.00), (VM: p=0.00), (VL: p=0.00) e (GM: p=0.00) and at 1km/h (RF: p=0.00), (VM: p=0.00), (VL: p=0.00) e (GM: p=0.00). When comparing the two modalities of treadmill training, at 4 and 1km/h, there was no statically significant difference between them (RF: p=0.36), (VM: p=1.00), (VL: p=1.00) e (GM: p=0.16). Conclusion: The gait training with body weight support is more effective in activating the muscles involved in the gait training on treadmill compared to overground training in patients with incomplete spinal cord injury.