cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9870989.v1
title: Byproducts of babassu (Orbignya sp) as new adsorptive materials: a review

description: ABSTRACT Babaçu (Orbignya sp) is a lignocellulosic plant, available in large scale in the north-northeast of Brazil, which has been emerging as a good source of biomaterials, being used in several studies as adsorbents. The objective of this study was to prospectively study the use of babaçu by-products (endocarp, mesocarp, epicarp and activated carbon) as a material with the exception of potential adsorptive target species for inorganic and organic molecules. was carried out through a literature review (article and patents), in the time period of July 2015 and February 2018. The databases used were: National Institute of Industrial Property of Brazil, World Intellectual Property Organization, Patents, Patent and Trademark Office of the United States of America and Spain for Patent Search; and Pubmed, Scopus, Web of Science and Scientific Electronic Library Online, for articles. From the careful analysis of the bibliographical survey, 18 scientific papers and 1 patent on the subject were selected. Among them, the mesocarp, epicarp (natural and modified) and the activated charcoal of babassu were very efficient adsorption substrates. The results were satisfactory, so that babassu was shown as a good indicator of cost and benefit, thus being a quality and accessible biomaterial.
DOI: 10.6084/m9.figshare.9870992.v1
title: Sustainable blends of LDPE/NR and sugarcane bagasse ashes with PE-g-MA thermomechanical relationships

description: ABSTRACT The polymer blends obtained with residues that before were called wastes has been growing as a viable solution, allowing improvements in the mechanical properties and as sustainable alternative. This work reports the effects of blends of low-density polyethylene (LDPE) and natural rubber (NR), with sugar cane bagasse ash (SCBA) as filler, with and without polyethylene-graft-maleic anhydride (PE-g-MA) how coupling agent. The dynamic mechanical behavior and a stress-strain analysis were studied. The materials were further evaluated by differential scanning calorimetry and morphological observations. The results showed that incorporation of the PE-g-MA reduced the strain and improved the stress and the Young module of the mixtures. Moreover, the presence of SCBA increased the hardness while maintaining the tensile strength and the elongation behavior of the polymer. The results demonstrate the potential use of SCBA in the elastomer and thermoplastic mixture, free of vulcanization agents.
DOI: 10.6084/m9.figshare.9870995.v1
title: Application of adsorptive process for desulphursation of fuel using coconut fiber as adsorbents

description: Abstract The development of more efficient and low-cost adsorbents to remove sulfur compounds has been improving, for instance, processes used in oil refining. Efficiency of desulfurization is correlated to the characteristics found in the adsorbent such as adsorption capacity, durability and regenerateness. This study aims to prepare coconut fiber impregnated with nickel and evaluate its adsorptive capacity of sulfur compounds such as the thiophene present in fuels. The utilized adsorbent was coconut fiber (mesocarp) obtained in the city of Quixadá, state of Ceará, and the adsorbate was thiophene in n-hexane solution. During an adsorbent characterization test it could be observed that the number of proton charges in the surface of both natural and modified fibers is a function of pH. The materials showed adsorptive capacity of 35,0 mg.g-1 of the sulfur compound. In the balance study, isotherm was best represented by the math model of Redlich-Peterson, which indicates heterogeneity in the adsorption sites. Adsorption kinetics was more adequate with the pseudo-second order model.
DOI: 10.25810/k55w-7a04.28
title: World Radio Coverage of Climate Change or Global Warming, 2000-2020 - July 2020

description:         The Media and Climate Change Observatory Data monitors 117 sources (across newspapers, radio and TV) in 53 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.
DOI: 10.6084/m9.figshare.9870980
title: Influence of thermo-oxidative aging on the mechanical and yellowing properties of polystyrene blends with recycled styrene-butadiene rubber (SBR)

description: ABSTRACT The objective of this study was to evaluate thermo-oxidative aging in the mechanical properties and yellowing index (YI) of polystyrene blends with compatibilized recycled rubber (SBRr). The blends were initially prepared in a co-rotating double screw extruder, after which the extruded granules were injection molded; high-impact polystyrene (HIPS) was processed under the same conditions for comparison. The SBRr characterization results revealed composition fillers of silica, calcium carbonate, talc, and zinc oxide, while thermogravimetry demonstrated two thermal decomposition stages. It was found that impact strength decreased significantly during the initial 15 days of aging and then showed a tendency to stabilize with small oscillations. Properties related to the modulus of elasticity, strength, and elongation at tensile rupture were similar to those of impact strength: a marked reduction in the initial 15 days followed by stabilization with aging. When a blend was compatibilized with 5% styrene-butadiene-styrene (SBS), optimal properties were observed before and after aging, indicating impact resistance comparable to HIPS. The blends’ loss of mass suggested volatile component extraction. In terms of the YI, the blends showed a sudden increase in the first 15 days of aging before stabilizing at a practically constant yellowing rate. Up to 30 days of aging, HIPS presented a low yellowing rate, after which point the YI intensified. In general, the blends obtained via mechanical mixing exhibited behavior similar to HIPS; for the blend compatibilized with SBS, however, the impact behavior was identical to that of HIPS.
DOI: 10.6084/m9.figshare.9870986.v1
title: Influence of the hydroxypropyl acrylate and hydroxypropyl methacrylate monomer concentration on the emulsion copolymerization of styrene with n-butyl acrylate and acrylonitrile to produce adhesives

description: ABSTRACT Hydroxyl acrylic monomers are important because the hydroxyl group present in the molecule can react with isocyanate groups, conferring better mechanical properties to the final polymer when applied onto some substrates. The aim of this work was to study the effects of the hydroxypropyl acrylate (HPA) and hydroxypropyl methacrylate (HPMA) monomer concentration on the emulsion polymerization of styrene (St) with n-butyl acrylate (ABu) and acrylonitrile (ACN). The goal of this work was to obtain latexes with higher concentrations of hydroxyl groups, ideal for reacting with isocyanate, without generating residues or coagulum. Latexes with different amounts of HPA and HPMA (0,3,5,7 e 10 wt%) were obtained and characterized with respect to solids content, viscosity, particle diameter, particle size distribution, freeze-thaw stability, minimum film forming temperature, coagulum formation, hardness and colloidal stability. The results show that the increased HPMA concentration affected the colloidal properties of the latexes. Among the concentrations of HPMA studied, it was possible to obtain latex with a maximum concentration of 5% HPA and 7% HPMA, whereas latex produced with 10% HPA and HPMA had low colloidal stability. Adhesives was obtained by mixing styrene-acrylic hydroxylated latex with a blocked poly(isocyanate) dispersion and characterized.
DOI: 10.6084/m9.figshare.9870983.v1
title: Effect of itaconic and fumaric acids on the emulsion copolymerization of styrene with n-butyl acrylate to produce cementitious mortar

description: ABSTRACT Carboxylic monomers are often employed in polymer formulations obtained by emulsion or miniemulsion polymerization with the aim of improve the better latex application properties. The aim of this work was to evaluate the effect of itaconic (IA), fumaric (FA) and methacrylic (MAA) acid on the emulsion copolymerization of styrene (STy) with n-butyl acrylate (ABu), aiming to obtain stable latexes with low concentration of poly(carboxylic acid) in the aqueous phase, to be used as cement additive. Latexes of STy/ABu/AI, STy/ABu/AF and Sty/ABu/AMA were obtained and characterized in relation to solids content, particle diameter, polydispersity, viscosity, minimum film forming temperature (TMFF), freeze-thaw stability, colloidal stability and distribution of the carboxylic groups. Cementitious mortar was prepared with the latexes and evaluated. The results obtained show that the type of carboxylic acid employed affects the physicochemical properties of latexes and the interaction with the components of the mortar. Among the acids studied, methacrylic acid had a lower effect on the colloidal properties of latexes. The latex produced with fumaric acid presented low colloidal stability, high concentration of carboxylic groups in the aqueous phase and low interaction with the components of the cementitious mortar.
DOI: 10.6084/m9.figshare.9870980.v1
title: Influence of thermo-oxidative aging on the mechanical and yellowing properties of polystyrene blends with recycled styrene-butadiene rubber (SBR)

description: ABSTRACT The objective of this study was to evaluate thermo-oxidative aging in the mechanical properties and yellowing index (YI) of polystyrene blends with compatibilized recycled rubber (SBRr). The blends were initially prepared in a co-rotating double screw extruder, after which the extruded granules were injection molded; high-impact polystyrene (HIPS) was processed under the same conditions for comparison. The SBRr characterization results revealed composition fillers of silica, calcium carbonate, talc, and zinc oxide, while thermogravimetry demonstrated two thermal decomposition stages. It was found that impact strength decreased significantly during the initial 15 days of aging and then showed a tendency to stabilize with small oscillations. Properties related to the modulus of elasticity, strength, and elongation at tensile rupture were similar to those of impact strength: a marked reduction in the initial 15 days followed by stabilization with aging. When a blend was compatibilized with 5% styrene-butadiene-styrene (SBS), optimal properties were observed before and after aging, indicating impact resistance comparable to HIPS. The blends’ loss of mass suggested volatile component extraction. In terms of the YI, the blends showed a sudden increase in the first 15 days of aging before stabilizing at a practically constant yellowing rate. Up to 30 days of aging, HIPS presented a low yellowing rate, after which point the YI intensified. In general, the blends obtained via mechanical mixing exhibited behavior similar to HIPS; for the blend compatibilized with SBS, however, the impact behavior was identical to that of HIPS.
DOI: 10.6084/m9.figshare.9870962
title: Do Women have Adequate Knowledge about Pelvic Floor Dysfunctions? A Systematic Review

description: Abstract Objective We sought to investigate whether women present adequate knowledge of the main pelvic floor disorders (PFDs) (urinary incontinence - UI, fecal incontinence - FI, and pelvic organ prolapse - POP). Data sources A systematic review was performed in the MEDLINE, PEDro, CENTRAL, and Cochrane databases for publications from inception to April 2018. Selection of studies A total of 3,125 studies were reviewed. Meta-analysis was not possible due to the heterogeneity of primary outcomes and the diversity of instruments for measuring knowledge. The quality of the articles included in the analysis was evaluated with the Newcastle-Ottawa Scale (NOS) adapted for cross-sectional studies. Data collection Two authors performed data extraction into a standardized spreadsheet. Data synthesis Nineteen studies were included, comprising 11,512 women. About the methodological quality (NOS), most of the studies (n= 11) presented a total score of 6 out of 10. Validated questionnaires and designed pilot-tested forms were the most frequently used ways of assessing knowledge. Some studies were stratified by race, age, or group minorities. The most used questionnaire was the prolapse and incontinence knowledge questionnaire (PIKQ) (n= 5). Knowledge and/or awareness regarding PFD was low to moderate among the studies. Urinary incontinence was the most prevalent PFD investigated, and the most important risk factors associated with the lack of knowledge of the pelvic floor were: African-American ethnicity (n= 3), low educational level (n= 4), low access to information (n= 5) and socioeconomic status (n= 3). Conclusion Most women have a gap in the knowledge of pelvic floor muscle dysfunctions, do not understand their treatment options, and are not able to identify risk factors for these disorders.
DOI: 10.6084/m9.figshare.9870959
title: Predico do Câncer de Mama com Aplicação de Modelos de Inteligência Computacional

description: ABSTRACT The use of computer aided diagnostic (CAD) models has been proposed to aid in the detection and classification of breast cancer. In this work, we evaluated the performance of neural network models of multilayered perceptrons and nonlinear support vector machines to classify breast cancer nodules. Ten morphological characteristics, from the outline of 569 samples, were used as input to the classifiers. The average results obtained in the set of 50 simulations showed that the proposed models presented good performance (all exceeded 90.0 %) in terms of the accuracy of the test set. The nonlinear support vector machine algorithm stands out when compared to the proposed multilevel perceptrons neural network algorithm, with accuracy of ≈ 99,0 % and false negative rate of approx 2.0 %. The neural network model presented inferior performance to the non-linear support vector machine classifier. The average results, with the application of the proposed models, are shown to be promising in the classification of breast cancer.
DOI: 10.6084/m9.figshare.9870950
title: Temporal trend of leprosy in a region of high endemicity in the Brazilian Northeast

description: ABSTRACT Objective: to analyze the temporal trend and epidemiological patterns of leprosy indicators in Sobral, a municipality countryside of the state of Ceará, from 2001 to 2016. Method: a time series study based on data from the Department of Informatics of the Unified Health System. The time trend analysis was performed using the join point regression model. Results: There were 2,220 new cases of leprosy in Sobral from 2001 to 2016. Of these, 158 (7.2%) in children younger than 15 years of age, the proportion of new male cases was 52.8% (1,162), cases with grade 2 were 7.0% (156), and proportion of cases diagnosed by contact examination 5.7% (126). Final considerations: leprosy remains hyperendemic in adults and children, demonstrating the character of neglected disease. Analysis of the temporal trend allowed to verify that the instability in the detection coefficients, reflect operational problems in the organization of the services
DOI: 10.6084/m9.figshare.9870956
title: Study of Patch Antennas with Koch Curve Form Slots

description: Abstract This work proposes the study of patch antennas with fractal slots. Initially, a 2.4 GHz microstrip antenna is designed. Then, the slots in the Koch fractals format are inserted with the iteration 0, 1 and 2. Similarly, it is expected that the antenna can be subjected to various functions in other applications. Simulations using CST STUDIO SUITE Student Edition software are shown, in addition to antenna measurements using the Network Analyzer.
DOI: 10.6084/m9.figshare.9870959.v1
title: Predico do Câncer de Mama com Aplicação de Modelos de Inteligência Computacional

description: ABSTRACT The use of computer aided diagnostic (CAD) models has been proposed to aid in the detection and classification of breast cancer. In this work, we evaluated the performance of neural network models of multilayered perceptrons and nonlinear support vector machines to classify breast cancer nodules. Ten morphological characteristics, from the outline of 569 samples, were used as input to the classifiers. The average results obtained in the set of 50 simulations showed that the proposed models presented good performance (all exceeded 90.0 %) in terms of the accuracy of the test set. The nonlinear support vector machine algorithm stands out when compared to the proposed multilevel perceptrons neural network algorithm, with accuracy of ≈ 99,0 % and false negative rate of approx 2.0 %. The neural network model presented inferior performance to the non-linear support vector machine classifier. The average results, with the application of the proposed models, are shown to be promising in the classification of breast cancer.
DOI: 10.6084/m9.figshare.9870962.v1
title: Do Women have Adequate Knowledge about Pelvic Floor Dysfunctions? A Systematic Review

description: Abstract Objective We sought to investigate whether women present adequate knowledge of the main pelvic floor disorders (PFDs) (urinary incontinence - UI, fecal incontinence - FI, and pelvic organ prolapse - POP). Data sources A systematic review was performed in the MEDLINE, PEDro, CENTRAL, and Cochrane databases for publications from inception to April 2018. Selection of studies A total of 3,125 studies were reviewed. Meta-analysis was not possible due to the heterogeneity of primary outcomes and the diversity of instruments for measuring knowledge. The quality of the articles included in the analysis was evaluated with the Newcastle-Ottawa Scale (NOS) adapted for cross-sectional studies. Data collection Two authors performed data extraction into a standardized spreadsheet. Data synthesis Nineteen studies were included, comprising 11,512 women. About the methodological quality (NOS), most of the studies (n= 11) presented a total score of 6 out of 10. Validated questionnaires and designed pilot-tested forms were the most frequently used ways of assessing knowledge. Some studies were stratified by race, age, or group minorities. The most used questionnaire was the prolapse and incontinence knowledge questionnaire (PIKQ) (n= 5). Knowledge and/or awareness regarding PFD was low to moderate among the studies. Urinary incontinence was the most prevalent PFD investigated, and the most important risk factors associated with the lack of knowledge of the pelvic floor were: African-American ethnicity (n= 3), low educational level (n= 4), low access to information (n= 5) and socioeconomic status (n= 3). Conclusion Most women have a gap in the knowledge of pelvic floor muscle dysfunctions, do not understand their treatment options, and are not able to identify risk factors for these disorders.
DOI: 10.6084/m9.figshare.9870944
title: Simulation and Design of a Bandpass Filter Based on Substrate Integrated E-Plane Waveguide

description: Abstract This paper presents a bandpass filter based on a substrate integrated E-plane waveguide (SIEW) structure for wireless applications, at X-band. The SIEW geometry allows the development of new horizontally polarized filter topologies, unlike filter structures based on substrate integrated waveguide (SIW), which present vertical polarization (perpendicular to the ground plane). The simulation of the proposed SIEW filter is carried out using Ansoft HFSS software. To evaluate the performance of the proposed structure, the frequency behaviors of the scattering parameters are obtained for a horizontally polarized excitation. In the simulation, analyses are performed for the lossless and lossy (dielectric and metallic) cases, in order to compare the obtained results. The SIEW filter is fabricated and measured using a vector network analyzer (VNA). Measurement results are in agreement with simulation ones, validating the proposed filter design and topology. The fabricated prototype resonates at 10.54 GHz, with a bandwidth of 1.20 GHz, defined for a -3 dB transmission coefficient reference level. The SIEW filter structure is easy to design and manufacture and can be used in wireless communications systems that require components with ease integration into other planar structures.
DOI: 10.6084/m9.figshare.9870947
title: Diet Quality Index associated with Digital Food Guide: update and validation

description: Monitoring and assessing dietary intake may favor the promotion of healthy choices and the indexes that assess the quality of the diet contribute to this purpose. The Diet Quality Index associated with the Digital Food Guide (DQI-DFG) was developed from guidelines of the School of Public Health at Harvard University, adjusted for the Brazilian food habits. Based on new studies on prevention of chronic non-communicable diseases, the objective of this study was to improve and validate the DQI-DFG for a second version. The following psychometric properties were used: (a) content validation: consensus on healthy eating and DQI among experts; (b) construct validation: enhancement of a reference diet to determine recommended serving sizes and consumption ranges; correlation between each group score and energy value; comparative analyses between menu assessment by experts and DQI-DGF results to confirm the score criterion; (c) reliability: agreement between the result shown by the evaluators and the result presented by DQI-DFG; correlation between each food group score and total DQI score to understand the relationship between these variables. The energetic values do not influence the DQI score. There is a high correlation between the score attributed by experts and the result of DQI-DFG (r = 0.78 until r = 0.97). The Index components have a balanced score of influence in its final result (r = 0.49 until r = 0.10). Consensus result performed among experts legitimates the concepts that justify DQI-DFG. There was an agreement between menu quality evaluation by experts and the results shown by DQI-DFG.
DOI: 10.6084/m9.figshare.9870947.v1
title: Diet Quality Index associated with Digital Food Guide: update and validation

description: Monitoring and assessing dietary intake may favor the promotion of healthy choices and the indexes that assess the quality of the diet contribute to this purpose. The Diet Quality Index associated with the Digital Food Guide (DQI-DFG) was developed from guidelines of the School of Public Health at Harvard University, adjusted for the Brazilian food habits. Based on new studies on prevention of chronic non-communicable diseases, the objective of this study was to improve and validate the DQI-DFG for a second version. The following psychometric properties were used: (a) content validation: consensus on healthy eating and DQI among experts; (b) construct validation: enhancement of a reference diet to determine recommended serving sizes and consumption ranges; correlation between each group score and energy value; comparative analyses between menu assessment by experts and DQI-DGF results to confirm the score criterion; (c) reliability: agreement between the result shown by the evaluators and the result presented by DQI-DFG; correlation between each food group score and total DQI score to understand the relationship between these variables. The energetic values do not influence the DQI score. There is a high correlation between the score attributed by experts and the result of DQI-DFG (r = 0.78 until r = 0.97). The Index components have a balanced score of influence in its final result (r = 0.49 until r = 0.10). Consensus result performed among experts legitimates the concepts that justify DQI-DFG. There was an agreement between menu quality evaluation by experts and the results shown by DQI-DFG.