cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8227151.v1
title: Translation and cross-cultural adaptation of the Motor Behavior Checklist (MBC) into Brazilian Portuguese

description: Abstract Introduction There are only a few instruments available to assess behavioral problems in school-age children based on reports of physical education teachers. The Motor Behavior Checklist (MBC) was designed to be completed by this professional in free play-situations or during physical education classes to rate students’ motor-related behavior using 5-point Likert scales. The MBC comprises 59 items distributed into two broadband factors (externalizing and internalizing) and seven behavior problem scales: rule breaking, hyperactivity/impulsivity, lack of attention, low energy, stereotyped behaviors, lack of social interaction, and lack of self-regulation. The objective of this study was to describe the translation and cross-cultural adaptation processes of the MBC into Brazilian Portuguese. Method The following procedures were conducted: forward translation of the original instrument, production of a synthesized version, back-translation, literal and semantic comparison, back-translator’s evaluation of divergent items, synthesized version with back-translator’s suggestions, clarity assessment of the synthesized version by professionals (physical education teachers), focus group to assess clarity indicators of the instrument, evaluation of adjustments by the author of the instrument, and production of the final version. Results The results indicated a satisfactory level of agreement between the original and the back-translated versions, with 68% of exact equivalence between the translated items and 16% of terms requiring minor adjustments. In the draft version, 84% of the items were evaluated as clear by physical education teachers. Conclusion The translated version has compatible content with the original version. Future studies should be conducted to assess the psychometric properties of the Brazilian Portuguese version of the MBC.
DOI: 10.6084/m9.figshare.8227136
title: Zooplankton associated with phytotelms and treefrogs in a neotropical forest

description: ABSTRACT Assumptions about the distribution of zooplankton communities in various ecosystems are often limited by lack of data on dispersal mechanisms. Many studies on frog-mediated passive dispersal have been developed in bromeliads, but they usually focus on ostracods and annelids. We investigated the potential for external phoresy of zooplankton (rotifers, cladocerans, copepods) by treefrogs in bromeliad phytotelms. Our hypotheses are that (1) zooplankton composition on frogs’ skin and in phytotelm tanks is similar, and (2) frogs with larger body size carry more propagules of these invertebrates. We filtered phytotelm water (10 to 150 mL) using plankton net (45 µm), and fixed invertebrates with 4% formalin. Frogs were actively collected in and around bromeliads (up to ~1.5 m radius) and then washed with distilled water. Fourteen species of rotifers and three of crustaceans were registered in phytotelm water and frog bodies. We captured 17 frogs with a snout-vent length (SVL) ranging from 2 to 5 cm and belonging to five species: Pristimantis ramagii (Boulenger, 1888), Dendropsophus decipiens (A. Lutz, 1925), Scinax auratus (Wied-Neuwied,1821), S. pachycrus (Miranda-Ribeiro, 1937) and S. x-signatus (Spix, 1824). Among them, 12 (70.59%) had propagules adhered to their bodies, of which the majority (ten individuals) had active zooplankton forms, while only two had dormant eggs. Ten rotifer and two microcrustacean species were recorded adhered to frogs. The zooplankton composition differed between phytotelms and anuran skin, and frog body size does not explain the number of propagules carried, refuting both hypotheses. However, evidence of dispersal was found due to the high number of propagules adhered to anurans. Our study provides evidence that frogs may be potential dispersers of dormant and active forms of zooplankton in bromeliads, through external phoresy.
DOI: 10.6084/m9.figshare.8227136.v1
title: Zooplankton associated with phytotelms and treefrogs in a neotropical forest

description: ABSTRACT Assumptions about the distribution of zooplankton communities in various ecosystems are often limited by lack of data on dispersal mechanisms. Many studies on frog-mediated passive dispersal have been developed in bromeliads, but they usually focus on ostracods and annelids. We investigated the potential for external phoresy of zooplankton (rotifers, cladocerans, copepods) by treefrogs in bromeliad phytotelms. Our hypotheses are that (1) zooplankton composition on frogs’ skin and in phytotelm tanks is similar, and (2) frogs with larger body size carry more propagules of these invertebrates. We filtered phytotelm water (10 to 150 mL) using plankton net (45 µm), and fixed invertebrates with 4% formalin. Frogs were actively collected in and around bromeliads (up to ~1.5 m radius) and then washed with distilled water. Fourteen species of rotifers and three of crustaceans were registered in phytotelm water and frog bodies. We captured 17 frogs with a snout-vent length (SVL) ranging from 2 to 5 cm and belonging to five species: Pristimantis ramagii (Boulenger, 1888), Dendropsophus decipiens (A. Lutz, 1925), Scinax auratus (Wied-Neuwied,1821), S. pachycrus (Miranda-Ribeiro, 1937) and S. x-signatus (Spix, 1824). Among them, 12 (70.59%) had propagules adhered to their bodies, of which the majority (ten individuals) had active zooplankton forms, while only two had dormant eggs. Ten rotifer and two microcrustacean species were recorded adhered to frogs. The zooplankton composition differed between phytotelms and anuran skin, and frog body size does not explain the number of propagules carried, refuting both hypotheses. However, evidence of dispersal was found due to the high number of propagules adhered to anurans. Our study provides evidence that frogs may be potential dispersers of dormant and active forms of zooplankton in bromeliads, through external phoresy.
DOI: 10.6084/m9.figshare.8227139
title: Actual evapotranspiration and crop coefficient of sweet orange during the initial development phase in the Rio Largo region, Alagoas

description: ABSTRACT: Determining actual crop evapotranspiration (ETa) is paramount for irrigation management. The principal measurement methods and physical models generally require crop and weather data that are not readily available. We determined the crop coefficient (Kc) of sweet oranges during the initial development stage and evaluated the performance of the Poulovassilis semi-empirical model coupled with a simple soil water balance for estimating the ETa. The ETa was inferred from the variation in the soil water content over time, measured by time-domain reflectometry. In the Poulovassilis model, the ETa is obtained by multiplying the crop evapotranspiration (ETc) by an adjustment coefficient (ca), which accounts for a reduction in the evapotranspiration caused by soil water depletion. Soil water storage was obtained using the daily and 10-day soil water balances, computed by considering inputs and outputs of water from the system. The empirical parameter, ca, was determined using inverse modeling. The optimal ca value obtained through inverse modeling was 0.05 and 0.03 for the daily and 10-day soil water balances, respectively. The model performed better for the daily soil water balance than the 10-day balance, with performance comparable with the other ETa models. Average Kc during the sweet orange initial crop stage was 0.85.
DOI: 10.6084/m9.figshare.8227133
title: Spatio-Temporal Variability of Carbon Monoxide Over South America Using Satellite-Sensed Data from 2003 to 2012

description: Abstract Using the information of the Earth Observation System/AQUA (EOS/AQUA) satellite during the 2003-2012 period, the present work investigates the tropospheric carbon monoxide (CO) behavior over the central South American region, and its spatiotemporal variability. The results show a well-defined seasonal behavior of the CO concentration, with decrease during the wet season and increase during dry season, due to the biomass burning increase during this period. Since the biomass burning is directly associated with the climate variability, through the rainfall decrease/increase in the central and eastern South American sector, the CO possesses high variability in central Brazil, the region with the largest number of burning focus. The results also show that the CO variability in the interanual time scale is related to the El Niño/Southern Oscillation (ENSO) phenomenon, such that rainfall reduction (increase) in the central and eastern part of South America during the La Niña (El Niño) onset phase contributes to increase (reduce) the biomass burning and in consequence the CO emission in this region. On the other hand, during the ENSO mature stage, the great rainfall and CO concentration variabilities occur in the northern and northeastern South American regions. The results presented in this paper might be useful for monitoring activities.
DOI: 10.6084/m9.figshare.8227130
title: Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075

description: This work proposes studying the softening kinetics of aluminum alloy 7075-T6. Firstly, AA 7075 strips were overaged (300°C and 5 hours). Then, the overaged strips were cold-rolled at room temperature (45% in thickness reduction) and, after that, annealed at different temperatures (200°C and 250°C) and time intervals (30 minutes - 4 hours). By using polarized light microscopy, EBSD and Vickers hardness measurements, the softening mechanisms were determined and proper mathematical models (Kuhlmann, Johnson-Mehl-Avrami-Kolmogorov and Austin-Rickett) were used to analyse the experimental data. The results show that although almost all observed softening can be attributed to recovery, the phenomena is well described by using mathematical models for phase transformations (JMAK and Austin Riccket). In order to promote recrystallization of overaged AA 7075, an additional thickness reduction (75%) were used. These samples were annealed isocronically during 1 hour (100 - 400°C) and it was found that recrystallization only took place at 400°C.
DOI: 10.6084/m9.figshare.8227133.v1
title: Spatio-Temporal Variability of Carbon Monoxide Over South America Using Satellite-Sensed Data from 2003 to 2012

description: Abstract Using the information of the Earth Observation System/AQUA (EOS/AQUA) satellite during the 2003-2012 period, the present work investigates the tropospheric carbon monoxide (CO) behavior over the central South American region, and its spatiotemporal variability. The results show a well-defined seasonal behavior of the CO concentration, with decrease during the wet season and increase during dry season, due to the biomass burning increase during this period. Since the biomass burning is directly associated with the climate variability, through the rainfall decrease/increase in the central and eastern South American sector, the CO possesses high variability in central Brazil, the region with the largest number of burning focus. The results also show that the CO variability in the interanual time scale is related to the El Niño/Southern Oscillation (ENSO) phenomenon, such that rainfall reduction (increase) in the central and eastern part of South America during the La Niña (El Niño) onset phase contributes to increase (reduce) the biomass burning and in consequence the CO emission in this region. On the other hand, during the ENSO mature stage, the great rainfall and CO concentration variabilities occur in the northern and northeastern South American regions. The results presented in this paper might be useful for monitoring activities.
DOI: 10.6084/m9.figshare.8227139.v1
title: Actual evapotranspiration and crop coefficient of sweet orange during the initial development phase in the Rio Largo region, Alagoas

description: ABSTRACT: Determining actual crop evapotranspiration (ETa) is paramount for irrigation management. The principal measurement methods and physical models generally require crop and weather data that are not readily available. We determined the crop coefficient (Kc) of sweet oranges during the initial development stage and evaluated the performance of the Poulovassilis semi-empirical model coupled with a simple soil water balance for estimating the ETa. The ETa was inferred from the variation in the soil water content over time, measured by time-domain reflectometry. In the Poulovassilis model, the ETa is obtained by multiplying the crop evapotranspiration (ETc) by an adjustment coefficient (ca), which accounts for a reduction in the evapotranspiration caused by soil water depletion. Soil water storage was obtained using the daily and 10-day soil water balances, computed by considering inputs and outputs of water from the system. The empirical parameter, ca, was determined using inverse modeling. The optimal ca value obtained through inverse modeling was 0.05 and 0.03 for the daily and 10-day soil water balances, respectively. The model performed better for the daily soil water balance than the 10-day balance, with performance comparable with the other ETa models. Average Kc during the sweet orange initial crop stage was 0.85.
DOI: 10.6084/m9.figshare.8227124
title: Pseudopotential Study of CdTe Quantum Dots: Electronic and Optical Properties

description: The present contribution reports on the electronic and optical properties of zinc-blende CdTe quantum dots using a pseudopotential approach. Our findings showed that the predicted nano-structured direct band gap is significantly increased relative to the bulk one. For a nanocrystal diameter in the range 1.2-5 nm, the refractive index and dielectric constant are found to be highly reduced relative the bulk values. Beyond a nanocrystal diameter of 5 nm, the size dependence of all features of interest becomes weak and tends towards retrieving the bulk value.
DOI: 10.6084/m9.figshare.8227127
title: Evaluation of Two Different Methods of Data Quality Analysis Using Local Daily Precipitation Measurements at Santa Catarina State

description: Abstract Daily rainfall data from a meteorological network in Southern Brazil is used to assess the performance of two different outliers detection algorithms. Both methods use a statistical and spatial consistency approach based in distance and elevation difference between two rain gauge measurements. A variation of the Multiple Interval Gamma Distribution method of You, Hubbard, Nadarajah e Kunkel (2007) is considered in this study. Neighboring stations data is gathered to get the local average rainfall distribution. The precipitation range of values is partitioned so one makes the assumption that every interval can be modeled by a Gamma distribution. The second method assumes no prior distribution characteristic, and instead uses point spatial and cumulated temporal information from neighboring rain gauge stations to consist daily rainfall data. In order to assess the reliability of the detected outliers, as well the accuracy, seeded errors are introduced in the historical rainfall series. A two dimensional probability model of introduced/detected error (yes-no) is used to compute metrics related to the correct detection and false alarm probabilities made by the algorithm. We verify that the new proposed method overcomes the Multiple Interval Gamma Distribution method.
DOI: 10.6084/m9.figshare.8227130.v1
title: Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075

description: This work proposes studying the softening kinetics of aluminum alloy 7075-T6. Firstly, AA 7075 strips were overaged (300°C and 5 hours). Then, the overaged strips were cold-rolled at room temperature (45% in thickness reduction) and, after that, annealed at different temperatures (200°C and 250°C) and time intervals (30 minutes - 4 hours). By using polarized light microscopy, EBSD and Vickers hardness measurements, the softening mechanisms were determined and proper mathematical models (Kuhlmann, Johnson-Mehl-Avrami-Kolmogorov and Austin-Rickett) were used to analyse the experimental data. The results show that although almost all observed softening can be attributed to recovery, the phenomena is well described by using mathematical models for phase transformations (JMAK and Austin Riccket). In order to promote recrystallization of overaged AA 7075, an additional thickness reduction (75%) were used. These samples were annealed isocronically during 1 hour (100 - 400°C) and it was found that recrystallization only took place at 400°C.
DOI: 10.6084/m9.figshare.8227118
title: On Estimation of Adhesive Strength of Implants Bioactive Coating with Titanium by Density Functional Theory and Molecular Dynamics Simulations

description: One of the ways to improve and accelerate osseointegration of a surgical implant with bone is application of biocompatible coatings, in particular, hydroxyapatite (HAp). Since the cases of delamination of the coating take place in dental practice, it is very important to estimate the adhesive strength of HAp with the implant. A measure of the coating-to-substrate bond strength is the energy of this bond. In this research, quantum chemistry is used to calculate the binding energy of functional groups (anions) of hydroxyapatite and titanium 2+, which is a standard implant material. First, using Density Functional Theory with Becke three-parameter Lee-Yang-Parr hybrid exchange-correlation functional, the lowest potential energy surface is calculated. Then, by ab initio molecular dynamics, the reaction path, the reaction products, frequencies of oscillations, the activation energies and binding energies between various combinations of component anions of HAp and Ti(II) are calculated.
DOI: 10.6084/m9.figshare.8227124.v1
title: Pseudopotential Study of CdTe Quantum Dots: Electronic and Optical Properties

description: The present contribution reports on the electronic and optical properties of zinc-blende CdTe quantum dots using a pseudopotential approach. Our findings showed that the predicted nano-structured direct band gap is significantly increased relative to the bulk one. For a nanocrystal diameter in the range 1.2-5 nm, the refractive index and dielectric constant are found to be highly reduced relative the bulk values. Beyond a nanocrystal diameter of 5 nm, the size dependence of all features of interest becomes weak and tends towards retrieving the bulk value.
DOI: 10.6084/m9.figshare.8227121
title: Extreme Rainfall Events in Northeast Brazil and Atmospheric Characteristics

description: Abstract This study investigated the means characteristics atmospherics associated with extreme precipitation events with until three-day delay before the occurrence of such extremes. The extreme events were chose when in most grid points on the Northeast of Brazil (2° S-12° S and 45° W-37° W), daily rainfall was equal or more than 50 mm. Daily data precipitation were of a set of rainfall stations distributed over NEB, from the observational networks of the National Institute of Meteorology, National Water Agency and Meteorology and Water Resources Regional's Centers, covering the period 1974-2003. These data were interpolated spatially using the technique of Inverse Square of the distance to a regular grid with a resolution of 1° in latitude and longitude (about 111 km). For analyzes of atmospheric features were used in atmospheric variables reanalysis data as southern zonal wind, air temperature, relative humidity and other reanalysis of NCEP-NOAA from the surface until 200 mb. The most significant results showed that three days before of the precipitation events considered extreme, there is a cold air incursion into the central area of the NEB, intensifying a day before of the events days, with lower anomalies below −4 °C, which do not appear to events considered of low rainfall over the region.
DOI: 10.6084/m9.figshare.8227127.v1
title: Evaluation of Two Different Methods of Data Quality Analysis Using Local Daily Precipitation Measurements at Santa Catarina State

description: Abstract Daily rainfall data from a meteorological network in Southern Brazil is used to assess the performance of two different outliers detection algorithms. Both methods use a statistical and spatial consistency approach based in distance and elevation difference between two rain gauge measurements. A variation of the Multiple Interval Gamma Distribution method of You, Hubbard, Nadarajah e Kunkel (2007) is considered in this study. Neighboring stations data is gathered to get the local average rainfall distribution. The precipitation range of values is partitioned so one makes the assumption that every interval can be modeled by a Gamma distribution. The second method assumes no prior distribution characteristic, and instead uses point spatial and cumulated temporal information from neighboring rain gauge stations to consist daily rainfall data. In order to assess the reliability of the detected outliers, as well the accuracy, seeded errors are introduced in the historical rainfall series. A two dimensional probability model of introduced/detected error (yes-no) is used to compute metrics related to the correct detection and false alarm probabilities made by the algorithm. We verify that the new proposed method overcomes the Multiple Interval Gamma Distribution method.
DOI: 10.6084/m9.figshare.8227112
title: Evaluation of Potential Residual Silica as Antireflective Layer for Selective Solar Surface of Black Chromium

description: Selective surfaces have the function of absorbing strongly the sunlight, while ideally losing little heat to the environment via convection and radiation. The present study sought to obtain a selective surface of black chromium coated with an antireflective (AR) layer based on sugarcane bagasse ash using copper as a substrate. From this selective surface the electrodeposition parameters (time, working distance, voltage) as well as the surface behavior were analyzed in order to determine if the AR layer provided an increase in the absorption levels of the film. By means of the present study it was possible to conclude that, in terms of the electrodeposition parameters evaluated, the anode-cathode distance of 5 cm stimulated the obtaining of higher levels of absorption. The addition of the antireflective layer on the black chromium films favored the increase of the absortance average in all the adopted parameter sets, besides reducing the standard deviation around the average. As for the microstructure of the obtained films, the increase of the parameter Ra promoted the increase of the absorption, due to the formation of optical traps.
DOI: 10.6084/m9.figshare.8227118.v1
title: On Estimation of Adhesive Strength of Implants Bioactive Coating with Titanium by Density Functional Theory and Molecular Dynamics Simulations

description: One of the ways to improve and accelerate osseointegration of a surgical implant with bone is application of biocompatible coatings, in particular, hydroxyapatite (HAp). Since the cases of delamination of the coating take place in dental practice, it is very important to estimate the adhesive strength of HAp with the implant. A measure of the coating-to-substrate bond strength is the energy of this bond. In this research, quantum chemistry is used to calculate the binding energy of functional groups (anions) of hydroxyapatite and titanium 2+, which is a standard implant material. First, using Density Functional Theory with Becke three-parameter Lee-Yang-Parr hybrid exchange-correlation functional, the lowest potential energy surface is calculated. Then, by ab initio molecular dynamics, the reaction path, the reaction products, frequencies of oscillations, the activation energies and binding energies between various combinations of component anions of HAp and Ti(II) are calculated.