cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9870878
title: Electromagnetic Core Analysis of a DFIG State-Feedback Power Controller

description: Abstract The energy demand by modern society grows every day that allied with sustainable development requires the use of alternative sources in the new energy matrix. In this context, the wind energy as source by using a doubly-fed induction generator stands out due to its operational savings but still faces some conflicts in its power control. This paper proposes a state feedback plus integral controller for rotor current control. In order to verify the controller operation, an electromagnetic finite element analysis simulation of the interior of the machine was carried out, assuring the non-saturation of the core, which would lead to a control instability and it can increase the machine losses. For this, a machine modeling was presented into state equations in order to establish a power control diagram. The results of electromagnetic simulation and the experimental bench results when united ensure the correct functioning of the proposed system and the satisfactory efficiency of the controller. In this way, it can be concluded that the use of this control technique in counterpart with the conventional PI increases the response time of the system without affecting the electromagnetic dynamics of the generator.
DOI: 10.6084/m9.figshare.9870881
title: Proposal of Visual Grammar for the Description and Compositional Analysis of Digital Videos in Sign Languages

description: ABSTRACT With the emergence of production and wide circulation of videos through the internet, deaf persons have gained a new and independent space for cultural expression, forming, in the last 20 years, digital collections that materially constitute a deaf-memory in sign languages. Thus, this paper presents the mapping and proposal of a visual grammar for pedagogic and academic-cultural videos in sign languages that currently circulate in digital repositories, in particular, YouTube. This study has a twofold aim: to propose an iconic representation for video artifacts created by/for the deaf community and to present an initial catalog of visual solutions captured from these products, organizing them for future authors and content creators. In terms of methodology, we focus on the compositional approach used in the analysis of 24 productions selected and examined by our research group in 2017-2018. As an outcome of the study, we have defined seven constituent basic elements and a set of possible variations and relationships between them, borrowing, for inspiration, categories originally presented by image and visual art theorists, including Arnheim, Dondis, and Leborg.
DOI: 10.6084/m9.figshare.9870887.v1
title: Different Strategies to Anchor Organotin Methoxides on Silica and Their (Re)Use as Heterogeneous Catalysts for Transesterification Reactions

description: Catalysts were prepared by the heterogenization of the tributyltin(IV) methoxide (n-Bu3Sn(OMe)) and dibutyltin(IV) dimethoxide (n-Bu2Sn(OMe)2) on silica by two strategies: (i) anchoring of the organotin(IV) compounds on silica and (ii) anchoring of the organotin(IV) compounds on a silica gel functionalized with mercaptopropyl groups (SiO2–SH). The characterization results showed that, regardless of the method used to anchor the organotin species, the solids contained approximately 7-10% of Sn. The decrease or disappearance of the O–H and S–H stretching signals in the SiO2 and SiO2–SH spectra after the treatment with the organotin(IV) methoxide derivatives suggest the immobilization via O–Sn or S–Sn covalent bonds. The catalytic performance was evaluated in methanolysis of ethyl acetate, in comparison to the analogous homogeneous systems, and the order of reactivity is n-Bu2Sn(OMe)2 &gt; n-Bu3Sn(OMe) &gt; SiO2–SnBu2 &gt; SiO2–S–SnBu2 &gt; SiO2–SnBu3 &gt; SiO2–S–SnBu3. The solids on which the organotin species were directly immobilized on activated SiO2 showed catalytic efficiencies slightly higher than those immobilized on thiol-functionalized silica. All of the solid catalysts were recovered and reused for recycling studies and characterized again after the reuse tests. A better interaction between n-Bu3Sn(OMe) and both supports was observed, as verified by the low leaching of Sn after the first catalytic reaction.
DOI: 10.6084/m9.figshare.9870890.v1
title: Construction and Evaluation of a Graphene Oxide Functionalized Aminopropyltriethoxy Silane Surface Molecularly Imprinted Polymer Potentiometric Sensor for Dipyridamole Detection in Urine and Pharmaceutical Samples

description: A dipyridamole (DIP) based surface molecularly imprinted polymer (MIP) was synthesized and applied as a sensing agent in a sensing layer of a new modified potentiometric carbon paste electrode (CPE). The potentiometric modified CPEs (GO@SiO2-NH2-MIP/MWCNTs/CPE, where GO is graphene oxide and MWCNTs is multi-walled carbon nanotubes) showed an improved performance in term of Nernstian slope, selectivity and response time compared to the unmodified CPE. The response time of the sensor in the range of 2.5 × 10-8-1.1 × 10-2 M DIP was 20 s. The obtained DIP sensor showed low limit of detection (1 × 10-8 M), and satisfactory long-term stability (higher than 4 months). The practical application of the sensor was demonstrated by the determination of DIP concentration in urine samples and pharmaceutical preparations, with good precision and acceptable recoveries (96.0-103.0%). The prepared sensor showed high selectivity for DIP over a number of common species (aspirin, caffeine, ascorbic acid, glucose, urea, bipyridine, Na+, Fe3+, Mg2+, Ca2+ and K+).
DOI: 10.6084/m9.figshare.9870884.v1
title: Instruments for quality of life assessment in individuals with human papillomavirus

description: ABSTRACT Objective: To identify scientific evidence on quality of life measurement instruments used in individuals with infections caused by human papillomavirus. Method: This was an integrative review carried out from April 1995 to March 2017 in the LILACS, SciVerse Scopus, ISI Web of Science, CINAHL, and PubMed databases. The controlled descriptors adopted were: Infecções por Papilomavirus; Qualidade de Vida; Papillomavirus Infections; and Quality of Life. Results: Of the 416 articles found, 12 were selected. Thirteen different types of instruments to evaluate the quality of life of individuals with human papillomavirus were identified, in that nine were generic and four specific. Conclusion: Different generic and specific instruments were used to evaluate the quality of life of individuals with human papillomavirus, which means no consensus or preference among the studies was identified. However, a lack of use of specific instruments to evaluate this construct in this population was observed.
DOI: 10.6084/m9.figshare.9870875
title: Education, the wealth of nations, and political tolerance toward homosexuals: a multilevel analysis of 26 countries in the Americas

description: While the positive effect of education on political tolerance toward minorities is well-known, we understand far less about education’s impact on tolerance across varying contexts. Utilizing multilevel statistical techniques, we find an interactive effect indicating that education at the individual level has a greater effect on political tolerance toward those who identify as homosexuals in wealthier countries. The results suggest that (1) completing additional levels of schooling may be insufficient to promote tolerant attitudes toward this minority and (2) more investment in education leads to stronger impacts. We support this finding by showing that where educational expenditures are greater, the average impact of secondary education is larger. The study uses individual data from 26 countries in the 2014 AmericasBarometer as well as indicators from the World Bank DataBank and Freedom House.
DOI: 10.6084/m9.figshare.9870878.v1
title: Electromagnetic Core Analysis of a DFIG State-Feedback Power Controller

description: Abstract The energy demand by modern society grows every day that allied with sustainable development requires the use of alternative sources in the new energy matrix. In this context, the wind energy as source by using a doubly-fed induction generator stands out due to its operational savings but still faces some conflicts in its power control. This paper proposes a state feedback plus integral controller for rotor current control. In order to verify the controller operation, an electromagnetic finite element analysis simulation of the interior of the machine was carried out, assuring the non-saturation of the core, which would lead to a control instability and it can increase the machine losses. For this, a machine modeling was presented into state equations in order to establish a power control diagram. The results of electromagnetic simulation and the experimental bench results when united ensure the correct functioning of the proposed system and the satisfactory efficiency of the controller. In this way, it can be concluded that the use of this control technique in counterpart with the conventional PI increases the response time of the system without affecting the electromagnetic dynamics of the generator.
DOI: 10.6084/m9.figshare.9870863
title: Policy networks in global environmental governance: connecting the Blue Amazon to Antarctica and the Biodiversity Beyond National Jurisdiction (BBNJ) agendas

description: Abstract Focusing on the domestic policy network around the Blue Amazon paradigm, this article challenges the frequently presented argument of Brazil as a key player in global environmental governance. In doing so, it applies a policy network approach to study the institutional framework that structures the country’s engagement in relation to the Antarctica and the Biodiversity Beyond National Jurisdiction (BBNJ) negotiation agendas.
DOI: 10.6084/m9.figshare.9870860
title: Global climate adaptation governance in the Amazon through a polycentricity lens

description: Abstract The 2015 Paris agreement has made adaptation to climate change a global goal and increased the polycentricity of the governance landscape. This study uses insights from polycentric governance theory to analyze the emergence of adaptation governance (AG) in Brazil and its implications for the state of Acre, situated in the Amazon region. By using a qualitative data analysis, including subnational climate policies and semi-structured interviews, we aim to analyze the advantages and challenges of polycentric AG in Acre and provide recommendations for improved AG in the region.
DOI: 10.6084/m9.figshare.9870875.v1
title: Education, the wealth of nations, and political tolerance toward homosexuals: a multilevel analysis of 26 countries in the Americas

description: While the positive effect of education on political tolerance toward minorities is well-known, we understand far less about education’s impact on tolerance across varying contexts. Utilizing multilevel statistical techniques, we find an interactive effect indicating that education at the individual level has a greater effect on political tolerance toward those who identify as homosexuals in wealthier countries. The results suggest that (1) completing additional levels of schooling may be insufficient to promote tolerant attitudes toward this minority and (2) more investment in education leads to stronger impacts. We support this finding by showing that where educational expenditures are greater, the average impact of secondary education is larger. The study uses individual data from 26 countries in the 2014 AmericasBarometer as well as indicators from the World Bank DataBank and Freedom House.
DOI: 10.6084/m9.figshare.9870860.v1
title: Global climate adaptation governance in the Amazon through a polycentricity lens

description: Abstract The 2015 Paris agreement has made adaptation to climate change a global goal and increased the polycentricity of the governance landscape. This study uses insights from polycentric governance theory to analyze the emergence of adaptation governance (AG) in Brazil and its implications for the state of Acre, situated in the Amazon region. By using a qualitative data analysis, including subnational climate policies and semi-structured interviews, we aim to analyze the advantages and challenges of polycentric AG in Acre and provide recommendations for improved AG in the region.
DOI: 10.6084/m9.figshare.9870863.v1
title: Policy networks in global environmental governance: connecting the Blue Amazon to Antarctica and the Biodiversity Beyond National Jurisdiction (BBNJ) agendas

description: Abstract Focusing on the domestic policy network around the Blue Amazon paradigm, this article challenges the frequently presented argument of Brazil as a key player in global environmental governance. In doing so, it applies a policy network approach to study the institutional framework that structures the country’s engagement in relation to the Antarctica and the Biodiversity Beyond National Jurisdiction (BBNJ) negotiation agendas.
DOI: 10.6084/m9.figshare.9870839
title: Implementation of pedagogical accreditation of lato sensu courses in Public Health in Brazil: challenges and perspectives

description: ABSTRACT The purpose of the article was to analyze the implementation of Pedagogical Accreditation in Brazil, from 2014 to 2018. A documentary analysis was carried out to produce the data, based on the reports elaborated in the period, seeking to identify the main problems related to this implementation in both the broader management dimension, as well as regarding the accreditation processes. The results pointed to problems of several orders and positive effects for the process, for the institutional actors and for the Unified Health System (SUS). The results show that there are management, pedagogical and infrastructure problems. However, accreditation has produced positive effects for schools, for workers and for the SUS.
DOI: 10.6084/m9.figshare.9870839.v1
title: Implementation of pedagogical accreditation of lato sensu courses in Public Health in Brazil: challenges and perspectives

description: ABSTRACT The purpose of the article was to analyze the implementation of Pedagogical Accreditation in Brazil, from 2014 to 2018. A documentary analysis was carried out to produce the data, based on the reports elaborated in the period, seeking to identify the main problems related to this implementation in both the broader management dimension, as well as regarding the accreditation processes. The results pointed to problems of several orders and positive effects for the process, for the institutional actors and for the Unified Health System (SUS). The results show that there are management, pedagogical and infrastructure problems. However, accreditation has produced positive effects for schools, for workers and for the SUS.
DOI: 10.6084/m9.figshare.9870842
title: Renal transplant patients with preformed anti-HLA antibodies: early biopsy findings and clinical outcomes

description: Abstract Introduction: Renal fibrosis is the end point of a process that begins at transplant, with ischemia reperfusion and early inflammation, and progresses over time with immunological and non-immunological phenomena. Early identification of morphological markers and intervention could improve graft function and survival. Objective: to evaluate the correlation between intensity and specificity of pre-transplant anti-HLA antibodies and kidney allograft pathology in order to identify early risk factors or markers of allograft dysfunction. Methods: A retrospective cohort of kidney transplant recipients with pre-transplant anti-HLA antibodies who underwent graft biopsy within the first two years post-transplant was divided into two groups according to the specificity of anti-HLA antibodies: nonspecific (non-DSA, n = 29) and specific (DSA+, n = 16). Kidney graft pathology, renal function, and proteinuria were analyzed. Results: general characteristics were similar in both groups, except for the higher dose of thymoglobulin in DSA+ group (p &lt; 0.05). The non-DSA group had higher scores for glomerulosclerosis, interstitial inflammation (i) and interstitial fibrosis (ci) (p &lt; 0.05) and higher incidence of cell-mediated acute rejection. No statistical difference in incidence of antibody-mediated rejection, renal function, and proteinuria was observed during follow up. Discussion and conclusions: the difference in inflammation scores and interstitial fibrosis may be associated to the higher incidence of acute cell-mediated rejection and polyomavirus nephropathy in the Non-DSA group. We also should take into account the protective effect of higher doses of thymoglobulin, reducing ischemia reperfusion injury in the DSA+ group. The short follow-up might have been insufficient to detect long-term changes in allograft tissue, renal function, and proteinuria.
DOI: 10.6084/m9.figshare.9870830
title: Nitriding of the Ti-6Al-4V alloy using electrical discharge machining with addition of SiC abrasive powder in the dielectric fluid

description: ABSTRACT The nitriding process using Electric Discharge Machining is a method that associates the ability to process complex surfaces with the obtaining of thermochemical treatment of nitriding. The titanium alloy Ti-6Al-4V has a wide applicability in the market, mainly because it presents excellent mechanical properties like high tensile strength, corrosion as well as low density. However, the alloy does not have good resistance to sliding wear, which prevents it from being applied as a raw material for parts subject to these conditions. Therefore, electrical discharge nitriding can significantly improve the slip wear resistance of the titanium alloy. The equipment used in this research was a conventional sink EDM machine. Adequations in the machine were necessary so that the dielectric fluid used did not contaminate the mineral oil, original equipment fluid. The graphite electrode was used as a tool electrode. SiC silicon carbide abrasive powder of 600 mesh granulometry was added to the aqueous solution formed by deionized water and urea, used as dielectric fluid. The samples were characterized by optical microscopy, X-ray diffraction (XRD), SEM, Vickers microhardness test and surface roughness measurements. The results obtained showed the formation of superficial layers enriched by electrolytic plasma with nitrogen, forming the ceramic compound TiN of high hardness. This layer has an average thickness of 104µm and its formation is present on every surface of the sample. It was observed an increase of the surface hardness in relation to the base material around 52% and a reduction of the roughness around 31% when compared to the nitriding process by electric discharges, without addition of the abrasive powder.
DOI: 10.6084/m9.figshare.9870830.v1
title: Nitriding of the Ti-6Al-4V alloy using electrical discharge machining with addition of SiC abrasive powder in the dielectric fluid

description: ABSTRACT The nitriding process using Electric Discharge Machining is a method that associates the ability to process complex surfaces with the obtaining of thermochemical treatment of nitriding. The titanium alloy Ti-6Al-4V has a wide applicability in the market, mainly because it presents excellent mechanical properties like high tensile strength, corrosion as well as low density. However, the alloy does not have good resistance to sliding wear, which prevents it from being applied as a raw material for parts subject to these conditions. Therefore, electrical discharge nitriding can significantly improve the slip wear resistance of the titanium alloy. The equipment used in this research was a conventional sink EDM machine. Adequations in the machine were necessary so that the dielectric fluid used did not contaminate the mineral oil, original equipment fluid. The graphite electrode was used as a tool electrode. SiC silicon carbide abrasive powder of 600 mesh granulometry was added to the aqueous solution formed by deionized water and urea, used as dielectric fluid. The samples were characterized by optical microscopy, X-ray diffraction (XRD), SEM, Vickers microhardness test and surface roughness measurements. The results obtained showed the formation of superficial layers enriched by electrolytic plasma with nitrogen, forming the ceramic compound TiN of high hardness. This layer has an average thickness of 104µm and its formation is present on every surface of the sample. It was observed an increase of the surface hardness in relation to the base material around 52% and a reduction of the roughness around 31% when compared to the nitriding process by electric discharges, without addition of the abrasive powder.
DOI: 10.6084/m9.figshare.9870842.v1
title: Renal transplant patients with preformed anti-HLA antibodies: early biopsy findings and clinical outcomes

description: Abstract Introduction: Renal fibrosis is the end point of a process that begins at transplant, with ischemia reperfusion and early inflammation, and progresses over time with immunological and non-immunological phenomena. Early identification of morphological markers and intervention could improve graft function and survival. Objective: to evaluate the correlation between intensity and specificity of pre-transplant anti-HLA antibodies and kidney allograft pathology in order to identify early risk factors or markers of allograft dysfunction. Methods: A retrospective cohort of kidney transplant recipients with pre-transplant anti-HLA antibodies who underwent graft biopsy within the first two years post-transplant was divided into two groups according to the specificity of anti-HLA antibodies: nonspecific (non-DSA, n = 29) and specific (DSA+, n = 16). Kidney graft pathology, renal function, and proteinuria were analyzed. Results: general characteristics were similar in both groups, except for the higher dose of thymoglobulin in DSA+ group (p &lt; 0.05). The non-DSA group had higher scores for glomerulosclerosis, interstitial inflammation (i) and interstitial fibrosis (ci) (p &lt; 0.05) and higher incidence of cell-mediated acute rejection. No statistical difference in incidence of antibody-mediated rejection, renal function, and proteinuria was observed during follow up. Discussion and conclusions: the difference in inflammation scores and interstitial fibrosis may be associated to the higher incidence of acute cell-mediated rejection and polyomavirus nephropathy in the Non-DSA group. We also should take into account the protective effect of higher doses of thymoglobulin, reducing ischemia reperfusion injury in the DSA+ group. The short follow-up might have been insufficient to detect long-term changes in allograft tissue, renal function, and proteinuria.
DOI: 10.6084/m9.figshare.9870827
title: Influence of the projectile’s geometry on dynamic tension experiment

description: ABSTRACT The focus of this study is to discuss the influence of the projectile’s length on the results of an experiment of the Hopkinson Traction Bar (SHTB). Simulations have been made by means of finite elements using the commercial software ABAQUS in tests of traction at high speeds of deformation in samples of aluminum alloy 7017T73 varying the length of the projectile. Finite element analyses have been applied to simulate the effects of the variation in the length of the projectile in the measurements obtained in the incident, reflected and transmitted rods. Different warp speeds have been obtained by varying the length of the projectile while remaining constant speed. The results of the simulation show that the length of the projectile has a significant effect on the tension obtained in the sample and on the curve of tension-deformation. It can be concluded that the length of the projectile is a factor influencing the tests of dynamic traction, since it has a significant effect on the tension obtained inside the specimen. The simulations also provide complementary information to the experiments and a thorough understanding of the specimen’s behavior.