cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5980057.v1
title: Experimental Investigation of Ternary Al-Si-Cu Alloy Solidified with Unsteady-State Heat Flow Conditions

description: Ternary Al-9.0wt%Si-4.0wt%Cu alloy was solidified in a vertical directional solidification system under unsteady-state heat flow conditions. The resulting dendritic morphology and microsegregation were investigated. A more detailed analysis was dedicated to the microsegregation phenomena where a multielement interaction was observed. The solidification parameters such as: solidification speed (VL) and cooling rate ( T ˙) were determined from the cooling curves obtained during the solidification process. The thermal variables effect on the dendritic morphology is presented. The measurements of tertiary dendrite arm spacing (λ3) and microsegregation were performed for different positions along the casting. The experimental curves for microsegregation were obtained for Si and Cu from the center of dendritic tertiary arm to the next nearest tertiary arm. The solidification speed (VL) influence is "built into" the effective partition coefficient (Kef_Cu and Kef_Si) that has been determined for the range of VL and microsegregation curves are calculated by Scheil's equation for comparison with experimental data. Good agreements of the Scheil's equation with experimental data on microsegregation curves of the Si and Cuwere obtained when effective partition coefficient (Kef_Cu and Kef_Si) is taken into consideration. The multielement interaction effect on the Si microsegregation is investigated. Experimental results show that, Cu-rich dendrites were accompanied by minute amounts of Si. The concentration profiles obtained experimentally point to a strong negative correlation between Si and VL on ternary Al-9.0wt%Si-4.0wt%Cu alloy.
DOI: 10.6084/m9.figshare.5980048
title: Push-out bond strength of different tricalcium silicate-based filling materials to root dentin

description: Abstract: The aim of this study was to evaluate the bond strength of different triccalcium silicate cements to retrograde cavity using a push out test. Thirty maxillary central incisors were shaped using #80 hand files and sectioned transversally. Root slices were obtained from the apical 4 mm after eliminating the apical extremity. The specimens were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. The samples were divided into three groups according to the root-end filling material (n = 10): MTA Angelus, ProRoot MTA and Biodentine. A gutta-percha cone (#80) was tugged-back at the limit between the canal and the root-end cavity. The root-end cavity was filled and the gutta-percha cone was removed after complete setting of the materials. The specimens were placed in an Instron machine with the root-end filling turned downwards. The push-out shaft was inserted in the space previously occupied by the gutta-percha cone and push out testing was performed at a crosshead speed of 1.0 mm/min. There was no statistically significant difference in resistance to push out by the materials tested (p &gt; 0.01). MTA Angelus and ProRoot MTA showed predominantly mixed failure while Biodentine exhibited mixed and cohesive failures. The tricalcium silicate-based root-end filling materials showed similar bond strength retrograde cavity.
DOI: 10.6084/m9.figshare.5980048.v1
title: Push-out bond strength of different tricalcium silicate-based filling materials to root dentin

description: Abstract: The aim of this study was to evaluate the bond strength of different triccalcium silicate cements to retrograde cavity using a push out test. Thirty maxillary central incisors were shaped using #80 hand files and sectioned transversally. Root slices were obtained from the apical 4 mm after eliminating the apical extremity. The specimens were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. The samples were divided into three groups according to the root-end filling material (n = 10): MTA Angelus, ProRoot MTA and Biodentine. A gutta-percha cone (#80) was tugged-back at the limit between the canal and the root-end cavity. The root-end cavity was filled and the gutta-percha cone was removed after complete setting of the materials. The specimens were placed in an Instron machine with the root-end filling turned downwards. The push-out shaft was inserted in the space previously occupied by the gutta-percha cone and push out testing was performed at a crosshead speed of 1.0 mm/min. There was no statistically significant difference in resistance to push out by the materials tested (p &gt; 0.01). MTA Angelus and ProRoot MTA showed predominantly mixed failure while Biodentine exhibited mixed and cohesive failures. The tricalcium silicate-based root-end filling materials showed similar bond strength retrograde cavity.
DOI: 10.6084/m9.figshare.5980045
title: Social inclusion policies and relations with difference: considerations about potentialities, transformations and limits in the UFG access and permanence practices

description: Abstract This article tries to describe and analyze some inclusion policies established at UFG – Federal University of Goiás. Based on the comparison between two of them, the UFGInclui program and the creation of the NTFSI – Takinahakỹ Indigenous Formation Center, aim to reflect on the university ambiguities, potentialities and transformations. It is hypothesized that the agency of people and collectives is fundamental in the process. And, fundamentally, that the university needs structural transformations for the concrete realization of the inclusion and permanence policies.
DOI: 10.6084/m9.figshare.5980045.v1
title: Social inclusion policies and relations with difference: considerations about potentialities, transformations and limits in the UFG access and permanence practices

description: Abstract This article tries to describe and analyze some inclusion policies established at UFG – Federal University of Goiás. Based on the comparison between two of them, the UFGInclui program and the creation of the NTFSI – Takinahakỹ Indigenous Formation Center, aim to reflect on the university ambiguities, potentialities and transformations. It is hypothesized that the agency of people and collectives is fundamental in the process. And, fundamentally, that the university needs structural transformations for the concrete realization of the inclusion and permanence policies.
DOI: 10.6084/m9.figshare.5980039
title: URBAN-REGIONAL DYNAMICS IN INTERNAL BORDER TERRITORIES

description: ABSTRACT This work aims to understand the Upper West Potiguar as an internal border region, located in Rio Grande do Norte (RN) state, between the states of Paraíba (PB) and Ceará (CE), scaled by the urban-regional dynamics led by the municipality of Pau dos Ferros / RN, as a polarizing center. To this end, a theoretical course was set involving the concepts of territory, borders and urban-regional dynamics, and also a metho dological course, which articulated these concepts to the analysis of residential data regarding the origin of higher education students and the commuting movements of people for study and work in Pau dos Ferros. It was found that the Upper West Potiguar is characterized as an internal region-border because it is located on the limits of states whose development was marked by this condition, distant from the ecumenes, and because it contains specific urban-regional dynamics, in the tempo of a polarizing center that converges hodiernal social and economic dynamics to itself.
DOI: 10.6084/m9.figshare.5980039.v1
title: URBAN-REGIONAL DYNAMICS IN INTERNAL BORDER TERRITORIES

description: ABSTRACT This work aims to understand the Upper West Potiguar as an internal border region, located in Rio Grande do Norte (RN) state, between the states of Paraíba (PB) and Ceará (CE), scaled by the urban-regional dynamics led by the municipality of Pau dos Ferros / RN, as a polarizing center. To this end, a theoretical course was set involving the concepts of territory, borders and urban-regional dynamics, and also a metho dological course, which articulated these concepts to the analysis of residential data regarding the origin of higher education students and the commuting movements of people for study and work in Pau dos Ferros. It was found that the Upper West Potiguar is characterized as an internal region-border because it is located on the limits of states whose development was marked by this condition, distant from the ecumenes, and because it contains specific urban-regional dynamics, in the tempo of a polarizing center that converges hodiernal social and economic dynamics to itself.
DOI: 10.6084/m9.figshare.5980036
title: Inclusion of the countryside youth into higher education: limits and possibilities

description: ABSTRACT All forms of exclusion of human beings from the possibility of access to the most advanced products of humankind is a violence which has to be combated. The access to higher education makes conditions more favourable for new generations to appropriate the historic and theoretical accumulation reached by humankind and, therefore, it is a universal right, that, from above the letter of the law and beyond discourses, needs to be materialized. In the countryside, the situation is even more serious than in the cities, requiring additional investments for the combat of historic deficit and to build better life conditions for youth. In this article, we will analyse the efficiency, the limits and challenges of the ten years of the policy of countryside youth insertion in the higher education’s implantation in Brazil, in the course of graduation in Countryside Education. Among these limits, the difficulty of validation of diploma stands out, as it is not recognized. Among the positive aspects, the ingress of many youths that wouldn’t have had access to the higher education is a highlight.
DOI: 10.6084/m9.figshare.5980036.v1
title: Inclusion of the countryside youth into higher education: limits and possibilities

description: ABSTRACT All forms of exclusion of human beings from the possibility of access to the most advanced products of humankind is a violence which has to be combated. The access to higher education makes conditions more favourable for new generations to appropriate the historic and theoretical accumulation reached by humankind and, therefore, it is a universal right, that, from above the letter of the law and beyond discourses, needs to be materialized. In the countryside, the situation is even more serious than in the cities, requiring additional investments for the combat of historic deficit and to build better life conditions for youth. In this article, we will analyse the efficiency, the limits and challenges of the ten years of the policy of countryside youth insertion in the higher education’s implantation in Brazil, in the course of graduation in Countryside Education. Among these limits, the difficulty of validation of diploma stands out, as it is not recognized. Among the positive aspects, the ingress of many youths that wouldn’t have had access to the higher education is a highlight.
DOI: 10.6084/m9.figshare.5980027
title: Patellofemoral and tibiofemoral forces during knee extension: simulations to strength training and rehabilitation exercises

description: Abstract Introduction: Limited evidence has been shown on ways to optimize the mechanical design of machines in order to minimize knee loads. Objective: This study compared six computer simulated models of open kinetic knee extension exercises for patellofemoral pressure and tibiofemoral forces. Methods: A musculoskeletal model of the lower limb was developed using six different cam radius to change resistive forces. A default machine, a constant cam radius, a torque-angle model, a free-weight model and two optimized models were simulated. Optimized models reduced cam radius at target knee flexion angles to minimize knee forces. Cam radius, human force, tibiofemoral compressive and shear force, and patellofemoral pressure were compared for the six models using data from five knee flexion angles. Results: Large reductions in cam radius comparing the free-weight model to other models (73-180%) were limited to the large human force for the constant cam model to other models (9-36%). Larger human force (13 -36%) was estimated to perform knee extension using a constant cam radius compared other models without large effects in knee joint forces. Conclusion: Changes in cam design effected human without a potential impact in knee loads.
DOI: 10.6084/m9.figshare.5980027.v1
title: Patellofemoral and tibiofemoral forces during knee extension: simulations to strength training and rehabilitation exercises

description: Abstract Introduction: Limited evidence has been shown on ways to optimize the mechanical design of machines in order to minimize knee loads. Objective: This study compared six computer simulated models of open kinetic knee extension exercises for patellofemoral pressure and tibiofemoral forces. Methods: A musculoskeletal model of the lower limb was developed using six different cam radius to change resistive forces. A default machine, a constant cam radius, a torque-angle model, a free-weight model and two optimized models were simulated. Optimized models reduced cam radius at target knee flexion angles to minimize knee forces. Cam radius, human force, tibiofemoral compressive and shear force, and patellofemoral pressure were compared for the six models using data from five knee flexion angles. Results: Large reductions in cam radius comparing the free-weight model to other models (73-180%) were limited to the large human force for the constant cam model to other models (9-36%). Larger human force (13 -36%) was estimated to perform knee extension using a constant cam radius compared other models without large effects in knee joint forces. Conclusion: Changes in cam design effected human without a potential impact in knee loads.
DOI: 10.6084/m9.figshare.5980024
title: Accountability in public-private partnerships: scope for advances in hospitals under direct management and in a partnership

description: Abstract This study sought to identify differences between the practices that promote accountability adopted by a state department of health for a hospital unit on a public-private partnership (PPP) and a hospital unit for the direct administration (UHAD). He studied the case of a PPP health sector compared to a UHAD using interviews, consultations with public domain documents and content analysis. Standing out as the differences related to the implementation of the PPP, are characterized by the advances in front of goal setting, ongoing monitoring and the promotion of external transparency, although such advances point to the accountability of results; and the fact of PPP governance have implicated in the increase in accountability, but promoters instruments showing lack in terms of promoting transparency. The study helps in the sense that it shows the relevance of accountability in partnership projects and opportunities for advancement. In future studies, point opportunities aimed at identifying practices of accountability promoted through PPPs in different sectors of the economy, in a comparative perspective, in order to identify the most sensitive sectors in terms of improving accountability.
DOI: 10.6084/m9.figshare.5980024.v1
title: Accountability in public-private partnerships: scope for advances in hospitals under direct management and in a partnership

description: Abstract This study sought to identify differences between the practices that promote accountability adopted by a state department of health for a hospital unit on a public-private partnership (PPP) and a hospital unit for the direct administration (UHAD). He studied the case of a PPP health sector compared to a UHAD using interviews, consultations with public domain documents and content analysis. Standing out as the differences related to the implementation of the PPP, are characterized by the advances in front of goal setting, ongoing monitoring and the promotion of external transparency, although such advances point to the accountability of results; and the fact of PPP governance have implicated in the increase in accountability, but promoters instruments showing lack in terms of promoting transparency. The study helps in the sense that it shows the relevance of accountability in partnership projects and opportunities for advancement. In future studies, point opportunities aimed at identifying practices of accountability promoted through PPPs in different sectors of the economy, in a comparative perspective, in order to identify the most sensitive sectors in terms of improving accountability.
DOI: 10.6084/m9.figshare.5980021
title: Persistent sciatic artery aneurysm: case report of endovascular treatment

description: Abstract A persistent sciatic artery is a rare congenital vascular anomaly. The most common complication is aneurysm. Clinical presentation may include symptoms resulting from arterial dilatation and ischemia caused by thrombosis or embolization. There are diverse options for treatment of this rare condition, ranging from ligature of the aneurism to endovascular repair. This report describes the case of a female patient complaining of a pulsating mass in the left buttock. She was referred to a Vascular Service where an angiotomography showed complete bilateral persistence of the sciatic artery, with an aneurysm of the left sciatic artery. The aneurysm was treated with endovascular techniques, via a contralateral approach, with placement of two stent grafts and preservation of distal patency. Patency is particularly important in cases of this anatomical variation in which the persistent sciatic artery is complete. This patient recovered well.
DOI: 10.6084/m9.figshare.5980021.v1
title: Persistent sciatic artery aneurysm: case report of endovascular treatment

description: Abstract A persistent sciatic artery is a rare congenital vascular anomaly. The most common complication is aneurysm. Clinical presentation may include symptoms resulting from arterial dilatation and ischemia caused by thrombosis or embolization. There are diverse options for treatment of this rare condition, ranging from ligature of the aneurism to endovascular repair. This report describes the case of a female patient complaining of a pulsating mass in the left buttock. She was referred to a Vascular Service where an angiotomography showed complete bilateral persistence of the sciatic artery, with an aneurysm of the left sciatic artery. The aneurysm was treated with endovascular techniques, via a contralateral approach, with placement of two stent grafts and preservation of distal patency. Patency is particularly important in cases of this anatomical variation in which the persistent sciatic artery is complete. This patient recovered well.
DOI: 10.6084/m9.figshare.5980009
title: Prognostic Accuracy of the GRACE Score in Octogenarians and Nonagenarians with Acute Coronary Syndromes

description: Abstract Background: The GRACE Score was derived and validated from a cohort in which octogenarians and nonagenarians were poorly represented. Objective: To test the accuracy of the GRACE score in predicting in-hospital mortality of very elderly individuals with acute coronary syndromes (ACS). Methods: Prospective observational study conducted in the intensive coronary care unit of a tertiary center from September 2011 to August 2016. Patients consecutively admitted due to ACS were selected, and the very elderly group was defined by age ≥ 80 years. The GRACE Score was based on admission data and its accuracy was tested regarding prediction of in-hospital death. Statistical significance was defined by p value &lt; 0,05. Results: A total of 994 individuals was studied, 57% male, 77% with non-ST elevation myocardial infarction and 173 (17%) very elderly patients. The mean age of the sample was 65 ± 13 years, and the mean age of very elderly patients subgroup was 85 ± 3.7 years. The C-statistics of the GRACE Score in very elderly patients was 0.86 (95% CI = 0.78 - 0.93), with no difference when compared to the value for younger individuals 0.83 (95% CI = 0.75 - 0.91), with p = 0.69. The calibration of the score in very elderly patients was described by χ2 test of Hosmer-Lemeshow = 2.2 (p = 0.98), while the remaining patients presented χ2 = 9.0 (p = 0.35). Logistic regression analysis for death prediction did not show interaction between GRACE Score and variable of very elderly patients (p = 0.25). Conclusion: The GRACE Score in very elderly patients is accurate in predicting in-hospital ACS mortality, similarly to younger patients.
DOI: 10.6084/m9.figshare.5980009.v1
title: Prognostic Accuracy of the GRACE Score in Octogenarians and Nonagenarians with Acute Coronary Syndromes

description: Abstract Background: The GRACE Score was derived and validated from a cohort in which octogenarians and nonagenarians were poorly represented. Objective: To test the accuracy of the GRACE score in predicting in-hospital mortality of very elderly individuals with acute coronary syndromes (ACS). Methods: Prospective observational study conducted in the intensive coronary care unit of a tertiary center from September 2011 to August 2016. Patients consecutively admitted due to ACS were selected, and the very elderly group was defined by age ≥ 80 years. The GRACE Score was based on admission data and its accuracy was tested regarding prediction of in-hospital death. Statistical significance was defined by p value &lt; 0,05. Results: A total of 994 individuals was studied, 57% male, 77% with non-ST elevation myocardial infarction and 173 (17%) very elderly patients. The mean age of the sample was 65 ± 13 years, and the mean age of very elderly patients subgroup was 85 ± 3.7 years. The C-statistics of the GRACE Score in very elderly patients was 0.86 (95% CI = 0.78 - 0.93), with no difference when compared to the value for younger individuals 0.83 (95% CI = 0.75 - 0.91), with p = 0.69. The calibration of the score in very elderly patients was described by χ2 test of Hosmer-Lemeshow = 2.2 (p = 0.98), while the remaining patients presented χ2 = 9.0 (p = 0.35). Logistic regression analysis for death prediction did not show interaction between GRACE Score and variable of very elderly patients (p = 0.25). Conclusion: The GRACE Score in very elderly patients is accurate in predicting in-hospital ACS mortality, similarly to younger patients.
DOI: 10.6084/m9.figshare.5980006
title: Extrinsic functional connectivity of the default mode network in crack-cocaine users

description: Abstract Objective: This study aimed to explore the functional connectivity of the default mode network (DMN) in crack-cocaine users, in comparison with that observed in age-matched non-drug-using controls. Materials and Methods: Inpatient crack-cocaine users who had been abstinent for at least four weeks and age-matched non-drug-using controls underwent resting state functional magnetic resonance imaging. Images were acquired while the subjects rested with their eyes closed. After data preprocessing, DMNs were defined by spatial independent component analysis and seed-based correlation analysis, by chosen regions of interest centered in the ventral anterior cingulate cortex and in the posterior cingulate cortex. Results: The functional connectivity of the DMN determined by independent component analysis did not differ between the crack-cocaine users and the controls. However, the seed-based correlation analysis seeking a single metric of functional connectivity between specific brain regions showed that the negative connectivity between the ventral anterior cingulate cortex and the left superior parietal lobule was significantly greater in the crack-cocaine users than in the controls. Conclusion: The results suggest that selective extrinsic network connectivity of the DMN related to motor and executive function is impaired during crack-cocaine addiction.