cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.6151694
title: Emotions emerging during the analysis of pedagogical content knowledge on electric field

description: Abstract This study deals with the affective domain integrated with the personal and social history of teachers, and their beliefs and cognitive representations. This defines the shape of pedagogical content knowledge (PCK) when teachers teach and plan a concept. Our study analyzes the emotions declared by two high school teachers in a qualitative study on the development of pedagogical content knowledge in the case of teaching the electric field. The array of emotions is an indicator of coincidences or discrepancies between PCK components, and the influence of decisions taken by the teacher. The most conflictive aspects of content in emotional terms are overlapping electric fields, and forces and the electro-kinetic relationship. Finally, the causes of both, positive and negative, are related to curriculum and content knowledge.
DOI: 10.6084/m9.figshare.6151694.v1
title: Emotions emerging during the analysis of pedagogical content knowledge on electric field

description: Abstract This study deals with the affective domain integrated with the personal and social history of teachers, and their beliefs and cognitive representations. This defines the shape of pedagogical content knowledge (PCK) when teachers teach and plan a concept. Our study analyzes the emotions declared by two high school teachers in a qualitative study on the development of pedagogical content knowledge in the case of teaching the electric field. The array of emotions is an indicator of coincidences or discrepancies between PCK components, and the influence of decisions taken by the teacher. The most conflictive aspects of content in emotional terms are overlapping electric fields, and forces and the electro-kinetic relationship. Finally, the causes of both, positive and negative, are related to curriculum and content knowledge.
DOI: 10.6084/m9.figshare.6151691
title: Double Kinetics of Intermetallic Phase Precipitation in UNS S32205 Duplex Stainless Steels Submitted to Isothermal Heat Treatment

description: One of the most studied deleterious phases in stainless steels is the sigma phase, due to its high potential to decrease the toughness and corrosion resistance of these steels. Eight samples of as-received cold rolled UNS S32205 duplex stainless steel were submitted to isothermal heat treatments at 850 oC during 10, 15, 30, 60, 120, 180, 240, and 300 minutes in order to study the precipitation kinetics of the sigma and chi deleterious phases. Several complementary microstructural analysis techniques were used to determine the volume fraction of the intermetallic phases, including optical microscopy and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). Evaluation was made of the kinetics of isothermal formation of sigma and chi phases in commercial duplex stainless steels (UNS S32205). The results indicated two different mechanisms for sigma phase precipitation: sigma phase formed from the chi phase for shorter isothermal heat treatment times, and sigma phase precipitated at the ferrite-austenite interface for longer isothermal heat treatment times, using a temperature of 850 oC. The phase transformation kinetics determined using the JMA equation indicated that chi phase precipitation caused faster sigma phase formation.
DOI: 10.6084/m9.figshare.6151691.v1
title: Double Kinetics of Intermetallic Phase Precipitation in UNS S32205 Duplex Stainless Steels Submitted to Isothermal Heat Treatment

description: One of the most studied deleterious phases in stainless steels is the sigma phase, due to its high potential to decrease the toughness and corrosion resistance of these steels. Eight samples of as-received cold rolled UNS S32205 duplex stainless steel were submitted to isothermal heat treatments at 850 oC during 10, 15, 30, 60, 120, 180, 240, and 300 minutes in order to study the precipitation kinetics of the sigma and chi deleterious phases. Several complementary microstructural analysis techniques were used to determine the volume fraction of the intermetallic phases, including optical microscopy and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). Evaluation was made of the kinetics of isothermal formation of sigma and chi phases in commercial duplex stainless steels (UNS S32205). The results indicated two different mechanisms for sigma phase precipitation: sigma phase formed from the chi phase for shorter isothermal heat treatment times, and sigma phase precipitated at the ferrite-austenite interface for longer isothermal heat treatment times, using a temperature of 850 oC. The phase transformation kinetics determined using the JMA equation indicated that chi phase precipitation caused faster sigma phase formation.
DOI: 10.6084/m9.figshare.6151685
title: Financialization, non-financial corporations and the recent economic cycle in the Brazilian economy.

description: Abstract This paper analyzes the changes in the equity strategies of non-financial corporations during the 2000s based on the literature on financialization and Minsky’s financial fragility hypothesis. The empirical analysis shows that internal repercussions of the 2008 international financial crisis resulted in an increase in the financial fragility of non-financial corporations, which largely explains the current recession. The contribution of the paper is to show the appropriateness of Minsky's financial fragility hypothesis to explain the reversal of the expansionary investment cycle observed in the mid-2000s and the process of financialization in the Brazilian economy.
DOI: 10.6084/m9.figshare.6151685.v1
title: Financialization, non-financial corporations and the recent economic cycle in the Brazilian economy.

description: Abstract This paper analyzes the changes in the equity strategies of non-financial corporations during the 2000s based on the literature on financialization and Minsky’s financial fragility hypothesis. The empirical analysis shows that internal repercussions of the 2008 international financial crisis resulted in an increase in the financial fragility of non-financial corporations, which largely explains the current recession. The contribution of the paper is to show the appropriateness of Minsky's financial fragility hypothesis to explain the reversal of the expansionary investment cycle observed in the mid-2000s and the process of financialization in the Brazilian economy.
DOI: 10.6084/m9.figshare.6151682
title: Microstructural Characterization and Influence of Ceramography Method on the Microhardness of Sintering Agents Added Silicon Carbide

description: This study carried out the microstructural characterization, by light microscopy, of sintered SiC in the presence of liquid phase at temperatures of 1800, 1850 and 1900 ºC, added with Al2O3 and Y2O3 as well with Al2O3-YAG composite in the proportions of 5, 10 and 15% by weight. It was possible to observe the formation of microstructural patterns resulting from the heterogeneous segregation of the additives, such observation is associated to the pulling of additives during the initial stage of ceramography. Two ceramographic paths were followed: method I - surface grinding followed by manual polishing and method II - automatic grinding and polishing. In order to compare the two techniques the analysis of 3D roughness by light interferometry and the Vickers microhardness test were used. It was concluded by the analysis of variance with 95% confidence that the degree of finishing obtained by both methods allowed the adequate microstructural characterization, as well as, to meet the requirements established by the ASTM C1327-15 standard for hardness test.
DOI: 10.6084/m9.figshare.6151682.v1
title: Microstructural Characterization and Influence of Ceramography Method on the Microhardness of Sintering Agents Added Silicon Carbide

description: This study carried out the microstructural characterization, by light microscopy, of sintered SiC in the presence of liquid phase at temperatures of 1800, 1850 and 1900 ºC, added with Al2O3 and Y2O3 as well with Al2O3-YAG composite in the proportions of 5, 10 and 15% by weight. It was possible to observe the formation of microstructural patterns resulting from the heterogeneous segregation of the additives, such observation is associated to the pulling of additives during the initial stage of ceramography. Two ceramographic paths were followed: method I - surface grinding followed by manual polishing and method II - automatic grinding and polishing. In order to compare the two techniques the analysis of 3D roughness by light interferometry and the Vickers microhardness test were used. It was concluded by the analysis of variance with 95% confidence that the degree of finishing obtained by both methods allowed the adequate microstructural characterization, as well as, to meet the requirements established by the ASTM C1327-15 standard for hardness test.
DOI: 10.6084/m9.figshare.6151670
title: Thermo-Mechanical Properties of P(HB-HV) Nanocomposites Reinforced by Nanodiamonds

description: Several studies of biodegradable polymers and copolymers have been carried for different applications in the biomedical area. This current study aims to develop a biocomposite to be used as an orthopedic device, using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) P(HB-HV), a biodegradable copolymer, with 94%HB and 6%HV, as matrix; and nanodiamonds (ND) with primary grains of 4-6nm, as reinforcement. The nanodiamonds were previously encapsulated by P(HB-HV) and specimens were prepared using a hydraulic press and injection molding machine, in order to evaluate which method presents a better performance. Thermal and mechanical analyses were done to compare their behavior. The biocomposite and pure P(HB-HV) samples were analyzed by flexural testing, nanoidentation, DMA, XRD, TGA. The distribution of nanodiamonds on the specimen fracture surface were investigated by SEM. The SEM micrographs allowed us to concluded that the encapsulation of nanodiamonds by P(HB-HV) was successfully performed, promoting a better interface and distribution in the polymeric matrix. The presence of ND in the polymeric matrix decreased the P(HB-HV) crystallinity, inhibiting the crystallite growth. The mechanical properties obtained from flexural test, nanoidentation and DMA of the injection-molded specimens were superior to compression-molded, due to its homogeneous and continuous structure. In vitro analysis was performed to evaluate the samples cytoxicity.
DOI: 10.6084/m9.figshare.6151670.v1
title: Thermo-Mechanical Properties of P(HB-HV) Nanocomposites Reinforced by Nanodiamonds

description: Several studies of biodegradable polymers and copolymers have been carried for different applications in the biomedical area. This current study aims to develop a biocomposite to be used as an orthopedic device, using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) P(HB-HV), a biodegradable copolymer, with 94%HB and 6%HV, as matrix; and nanodiamonds (ND) with primary grains of 4-6nm, as reinforcement. The nanodiamonds were previously encapsulated by P(HB-HV) and specimens were prepared using a hydraulic press and injection molding machine, in order to evaluate which method presents a better performance. Thermal and mechanical analyses were done to compare their behavior. The biocomposite and pure P(HB-HV) samples were analyzed by flexural testing, nanoidentation, DMA, XRD, TGA. The distribution of nanodiamonds on the specimen fracture surface were investigated by SEM. The SEM micrographs allowed us to concluded that the encapsulation of nanodiamonds by P(HB-HV) was successfully performed, promoting a better interface and distribution in the polymeric matrix. The presence of ND in the polymeric matrix decreased the P(HB-HV) crystallinity, inhibiting the crystallite growth. The mechanical properties obtained from flexural test, nanoidentation and DMA of the injection-molded specimens were superior to compression-molded, due to its homogeneous and continuous structure. In vitro analysis was performed to evaluate the samples cytoxicity.
DOI: 10.6084/m9.figshare.6151667
title: Preparation of Antireflective Silica Coating by the Sol-Gel Method for Heliothermic Power Plants

description: This work deals with the deposition of a thin layer of porous silica antireflective coating onto glass substrates. The films were deposited with different withdrawal speeds and heat-treated at 425°C for 30 minutes. The effects of heat treatment and film deposition rate on the films reflectance were evaluated. The diffuse reflectance was measured using ultraviolet-visible (UV-Vis) spectroscopy. Scanning electron microscopy (SEM) was used for microstructural evaluation of the films. The water contact angle upon the films surface was evaluated using a tensiometer and was based on the sessile drop technique. The mechanical characteristics of the films were evaluated by tape test and pencil hardness. The obtained sol-gel silica coatings were homogeneous and free of cracks. UV-Vis analysis of the glass substrate revealed a reflectance value of 3.86%, whereas the lowest reflectance value obtained for antireflective coatings was 2.72%. The contact angle measurement showed that, for all films, there was wetting of the film by water, characterizing them as hydrophilic. The adhesion of the films were 4B and the pencil hardness were 3H.
DOI: 10.6084/m9.figshare.6151667.v1
title: Preparation of Antireflective Silica Coating by the Sol-Gel Method for Heliothermic Power Plants

description: This work deals with the deposition of a thin layer of porous silica antireflective coating onto glass substrates. The films were deposited with different withdrawal speeds and heat-treated at 425°C for 30 minutes. The effects of heat treatment and film deposition rate on the films reflectance were evaluated. The diffuse reflectance was measured using ultraviolet-visible (UV-Vis) spectroscopy. Scanning electron microscopy (SEM) was used for microstructural evaluation of the films. The water contact angle upon the films surface was evaluated using a tensiometer and was based on the sessile drop technique. The mechanical characteristics of the films were evaluated by tape test and pencil hardness. The obtained sol-gel silica coatings were homogeneous and free of cracks. UV-Vis analysis of the glass substrate revealed a reflectance value of 3.86%, whereas the lowest reflectance value obtained for antireflective coatings was 2.72%. The contact angle measurement showed that, for all films, there was wetting of the film by water, characterizing them as hydrophilic. The adhesion of the films were 4B and the pencil hardness were 3H.
DOI: 10.6084/m9.figshare.6151664
title: INSTITUTIONAL SUPPORT: THE PERCEPTION OF THE SUPPORTERS IN A PUBLIC MATERNITY HOSPITAL OF ALAGOAS, BRAZIL

description: Abstract The The objective of this article is to understand the performance of the supporters in a public maternity hospital in the state of Alagoas, Brazil, during the course of implanting the National Humanization Policy, moreover, this study analyzed how the promotion and development of National Humanization Policy practices have been happening in the institution. So, it emphasizes the implementation of the guideline value of labor and worker, including, in this path, the difficulties and facilities found by the supporters combined with the management bodies and also in the fulfillment of intervention processes. The present study is based on the social health research field with qualitative approach. It has been analyzed institutional documents and conducted in-depth research with key actors in this process. The data analysis in methodological basis was Hermeneutics Dialectic. It was built an analytical matrix with two macro categories and six operative categories to organize and present the data collected. The analysis of data allowed to understand the main strategies used by supporters in daily lives of their work, which leads to National Humanization Policy progress and point disconnections and critical nodes to be problematised.
DOI: 10.6084/m9.figshare.6151664.v1
title: INSTITUTIONAL SUPPORT: THE PERCEPTION OF THE SUPPORTERS IN A PUBLIC MATERNITY HOSPITAL OF ALAGOAS, BRAZIL

description: Abstract The The objective of this article is to understand the performance of the supporters in a public maternity hospital in the state of Alagoas, Brazil, during the course of implanting the National Humanization Policy, moreover, this study analyzed how the promotion and development of National Humanization Policy practices have been happening in the institution. So, it emphasizes the implementation of the guideline value of labor and worker, including, in this path, the difficulties and facilities found by the supporters combined with the management bodies and also in the fulfillment of intervention processes. The present study is based on the social health research field with qualitative approach. It has been analyzed institutional documents and conducted in-depth research with key actors in this process. The data analysis in methodological basis was Hermeneutics Dialectic. It was built an analytical matrix with two macro categories and six operative categories to organize and present the data collected. The analysis of data allowed to understand the main strategies used by supporters in daily lives of their work, which leads to National Humanization Policy progress and point disconnections and critical nodes to be problematised.
DOI: 10.6084/m9.figshare.6151661
title: Devulcanization of Natural Rubber in Composites with Distinct Crosslink Densities by Twin-Screw Extruder

description: In this study, the effects of the devulcanization process realized by an intermeshing co-rotating twin-screw extruder (ICTSE) on three vulcanized Natural Rubber (NR) composites with different crosslink densities (CD) have been investigated. The extrusion parameters were fixed, as well as the initial material granulometry and auxiliary thermoplastic added to the process. After composites vulcanization, they were characterized accordingly their soluble fraction (SF), crosslink density (CD), mechanical properties and thermogravimetry (TGA). The extrusion was performed on the vulcanized elastomers pursuing selectively crosslink rupture and the same characterization previously cited was conducted on the devulcanized material, except the mechanical properties analysis. The extrusion demonstrate effective devulcanization, evidenced in the increasing of soluble fractions, reduction in crosslink density and thermal stability gain. These results are directly affected by preliminary differences on materials structure and presence of ethylene vinyl-acetate (EVA) on extrusion.
DOI: 10.6084/m9.figshare.6151661.v1
title: Devulcanization of Natural Rubber in Composites with Distinct Crosslink Densities by Twin-Screw Extruder

description: In this study, the effects of the devulcanization process realized by an intermeshing co-rotating twin-screw extruder (ICTSE) on three vulcanized Natural Rubber (NR) composites with different crosslink densities (CD) have been investigated. The extrusion parameters were fixed, as well as the initial material granulometry and auxiliary thermoplastic added to the process. After composites vulcanization, they were characterized accordingly their soluble fraction (SF), crosslink density (CD), mechanical properties and thermogravimetry (TGA). The extrusion was performed on the vulcanized elastomers pursuing selectively crosslink rupture and the same characterization previously cited was conducted on the devulcanized material, except the mechanical properties analysis. The extrusion demonstrate effective devulcanization, evidenced in the increasing of soluble fractions, reduction in crosslink density and thermal stability gain. These results are directly affected by preliminary differences on materials structure and presence of ethylene vinyl-acetate (EVA) on extrusion.
DOI: 10.6084/m9.figshare.6151658
title: HEALTH LITERACY AND ASSOCIATED FACTORS IN ADULTS PRIMARY CARE USERS

description: Abstract The aim was to investigate health literacy and association with social and demographic factors, self-perception of health and quality of life in adults. This is a cross-sectional study with adults between 20 and 59 years, users of primary health care, conducted in the basic health units, from February to May of 2015 – probability sample. Health literacy was evaluated by means of Short Assessment of Health Literacy for Portuguese-speaking Adults. Descriptive statistical analysis, bivariate analysis (p ≤ 0.20) and multiple logistic regression (p ≤ 0.05) were performed. Inadequate health literacy was recurrent and initially associated with sex, schooling, last grade concluded with approval, minimum formal study, Brasil Economic Classification Criterion, health insurance, family arrangement, importance attributed to health, grade attributed to own health, attendance to the basic health unit and two domains of the test World Health Organization Quality of Life (social relations and environmental). In the final model of logistic regression, only schooling remained associated with health literacy, in a way that individuals with less schooling had more chance of having inadequate health literacy. The findings suggest the need to develop health education strategies for adult users of primary care.
DOI: 10.6084/m9.figshare.6151658.v1
title: HEALTH LITERACY AND ASSOCIATED FACTORS IN ADULTS PRIMARY CARE USERS

description: Abstract The aim was to investigate health literacy and association with social and demographic factors, self-perception of health and quality of life in adults. This is a cross-sectional study with adults between 20 and 59 years, users of primary health care, conducted in the basic health units, from February to May of 2015 – probability sample. Health literacy was evaluated by means of Short Assessment of Health Literacy for Portuguese-speaking Adults. Descriptive statistical analysis, bivariate analysis (p ≤ 0.20) and multiple logistic regression (p ≤ 0.05) were performed. Inadequate health literacy was recurrent and initially associated with sex, schooling, last grade concluded with approval, minimum formal study, Brasil Economic Classification Criterion, health insurance, family arrangement, importance attributed to health, grade attributed to own health, attendance to the basic health unit and two domains of the test World Health Organization Quality of Life (social relations and environmental). In the final model of logistic regression, only schooling remained associated with health literacy, in a way that individuals with less schooling had more chance of having inadequate health literacy. The findings suggest the need to develop health education strategies for adult users of primary care.
DOI: 10.6084/m9.figshare.6151655
title: Suicide in Portugal: image of the country

description: ABSTRACT Objective To identify patterns of suicide trends registered in Portugal, taking into account a set of socio-economic and demographic variables between the years 2007 and 2014 in order to obtain an overview of this scourge in Portugal. Methods Using data from the National Institute of Statistics (INE) and the Death Certificate Information System (SICO), suicide was analyzed according to the category of ICD10 (International Classification of Diseases), the incidence by gender, age group and region. Results The most affected to suicide are men (54,8%), over 75 years old (30.9%) and occurs in the more rural areas of the interior of the country that are more deprived of materials. The highest suicide mortality is found in the Alentejo region (12,8%). Conclusion Mortality due to suicide continues to grow in Portugal and varies according to gender, age is highest in the Central and South regions. A strategy of follow-up and prevention in the field of social action and health care is required, with important regional variations and greater vigilance on the illegal trade in firearms and pesticides.