cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.6179537
title: Free vibration analysis and design optimization of SMA/Graphite/Epoxy composite shells in thermal environments

description: Abstract Composite shells, which are being widely used in engineering applications, are often under thermal loads. Thermal loads usually bring thermal stresses in the structure which can significantly affect its static and dynamic behaviors. One of the possible solutions for this matter is embedding Shape Memory Alloy (SMA) wires into the structure. In the present study, thermal buckling and free vibration of laminated composite cylindrical shells reinforced by SMA wires are analyzed. Brinson model is implemented to predict the thermo-mechanical behavior of SMA wires. The natural frequencies and buckling temperatures of the structure are obtained by employing Generalized Differential Quadrature (GDQ) method. GDQ is a powerful numerical approach which can solve partial differential equations. A comparative study is carried out to show the accuracy and efficiency of the applied numerical method for both free vibration and buckling analysis of composite shells in thermal environment. A parametric study is also provided to indicate the effects of like SMA volume fraction, dependency of material properties on temperature, lay-up orientation, and pre-strain of SMA wires on the natural frequency and buckling of Shape Memory Alloy Hybrid Composite (SMAHC) cylindrical shells. Results represent the fact that SMAs can play a significant role in thermal vibration of composite shells. The second goal of present work is optimization of SMAHC cylindrical shells in order to maximize the fundamental frequency parameter at a certain temperature. To this end, an eight-layer composite shell with four SMA-reinforced layers is considered for optimization. The primary optimization variables are the values of SMA angles in the four layers. Since the optimization process is complicated and time consuming, Genetic Algorithm (GA) is performed to obtain the orientations of SMA layers to maximize the first natural frequency of structure. The optimization results show that using an optimum stacking sequence for SMAHC shells can increase the fundamental frequency of the structure by a considerable amount.
DOI: 10.6084/m9.figshare.6179528
title: The “y”, the Article and Orthography: Censorship and the Portuguese Vernacular in 18th Century

description: Abstract This article explores a secret debate between several Portuguese censors, in 1771, on two spelling books: the Resumo da grammatica da lingua portuguesa by Antonio José dos Reis Lobato, and the Breve tratado da orthografia, para os que não frequentam os estudos, ou dialogos sobre as mais principaes regras da orthografia, uteis para o povo menos instruido, accrescentado com hum dialogo da prozodia portugueza, by João Pinheiro Freire da Cunha. In eight written opinions on these two books, submitted to the Real Mesa Censória for analysis as to their publication, the censors advanced debates on orthodoxy and pluralism, freedom of expression and scientific advance, while seeking to establish parameters of an official vernacular of the Portuguese language, expanding beyond the prohibition of books, the idea of censorship that is traditionally seen by historiography.
DOI: 10.6084/m9.figshare.6179525
title: Feasibility of biohydrogen production by co-digestion of vinasse (sugarcane stillage) and molasses in an AnSBBR

description: Abstract This work studied the feasibility of biohydrogen production by co-digestion of vinasse/molasses in an AnSBBR operated with mechanical stirring (30°C and 200 rpm). Hydrogen production by co-digestion of vinasse/sucrose was also studied to verify the performance of the process with a known co-substrate with easy degradation. The effects of influent composition (vinasse/sucrose and vinasse/molasses), influent concentration (3000 and 4000 mgCOD.L-1) and cycle time (3 and 4 h) on performance indicators were evaluated using stability, organic matter removal efficiency, molar hydrogen yield, productivity and biogas composition. The condition with vinasse/molasses in the influent that showed the best results was obtained with a 3-hour cycle time, influent concentration of 3000 mgCOD.L-1 and composition of 33% vinasse and 67% molasses. The molar productivity in this condition was 3.8 molH2.m-3.d-1 with a hydrogen molar fraction of 16% (and a methane molar fraction of 14%). A first order kinetic model was fitted efficiently to the best conditions.
DOI: 10.6084/m9.figshare.6179528.v1
title: The “y”, the Article and Orthography: Censorship and the Portuguese Vernacular in 18th Century

description: Abstract This article explores a secret debate between several Portuguese censors, in 1771, on two spelling books: the Resumo da grammatica da lingua portuguesa by Antonio José dos Reis Lobato, and the Breve tratado da orthografia, para os que não frequentam os estudos, ou dialogos sobre as mais principaes regras da orthografia, uteis para o povo menos instruido, accrescentado com hum dialogo da prozodia portugueza, by João Pinheiro Freire da Cunha. In eight written opinions on these two books, submitted to the Real Mesa Censória for analysis as to their publication, the censors advanced debates on orthodoxy and pluralism, freedom of expression and scientific advance, while seeking to establish parameters of an official vernacular of the Portuguese language, expanding beyond the prohibition of books, the idea of censorship that is traditionally seen by historiography.
DOI: 10.6084/m9.figshare.6179525.v1
title: Feasibility of biohydrogen production by co-digestion of vinasse (sugarcane stillage) and molasses in an AnSBBR

description: Abstract This work studied the feasibility of biohydrogen production by co-digestion of vinasse/molasses in an AnSBBR operated with mechanical stirring (30°C and 200 rpm). Hydrogen production by co-digestion of vinasse/sucrose was also studied to verify the performance of the process with a known co-substrate with easy degradation. The effects of influent composition (vinasse/sucrose and vinasse/molasses), influent concentration (3000 and 4000 mgCOD.L-1) and cycle time (3 and 4 h) on performance indicators were evaluated using stability, organic matter removal efficiency, molar hydrogen yield, productivity and biogas composition. The condition with vinasse/molasses in the influent that showed the best results was obtained with a 3-hour cycle time, influent concentration of 3000 mgCOD.L-1 and composition of 33% vinasse and 67% molasses. The molar productivity in this condition was 3.8 molH2.m-3.d-1 with a hydrogen molar fraction of 16% (and a methane molar fraction of 14%). A first order kinetic model was fitted efficiently to the best conditions.
DOI: 10.6084/m9.figshare.6179519
title: PRODUCTION OF PARTICLEBOARD FROM DISCARDED FURNITURE1

description: ABSTRACT This research aims to evaluate the quality of particleboard produced with particles generated from discarded furniture, both in its pure form or mixed with industrial particles of Pinus. The material was collected in the region of Curitiba City (Paraná) in the form of chips processed in an industrial chipper of a company specialized in waste wood recycling. The experimental plan consisted in producing panels with 10%, 25%, 50% and 75% of particles obtained from discarded furniture mixed with particles of Pinus, and panels with 100% of such materials. Panels were produced with nominal density of 0,70 g/cm3, using the urea-formaldehyde resin in a proportion of 10% solids - dry basis weight of the particles and 1% paraffin emulsion. The panels were pressed with a specific pressure of 4,0 MPa, temperature of 140ºC and pressing time of 10 minutes. The results of internal bond met the requirements of the standard EN 312, which indicates that there was an adequate bonding of these particles obtained from discarded furniture. The results of physical and mechanical properties of the panels demonstrated the feasibility of using particles from discarded furniture when producing particleboard, with the possibility of full use of these particles from waste without mixing it with industrial particles of Pinus free from contamination.
DOI: 10.6084/m9.figshare.6179519.v1
title: PRODUCTION OF PARTICLEBOARD FROM DISCARDED FURNITURE1

description: ABSTRACT This research aims to evaluate the quality of particleboard produced with particles generated from discarded furniture, both in its pure form or mixed with industrial particles of Pinus. The material was collected in the region of Curitiba City (Paraná) in the form of chips processed in an industrial chipper of a company specialized in waste wood recycling. The experimental plan consisted in producing panels with 10%, 25%, 50% and 75% of particles obtained from discarded furniture mixed with particles of Pinus, and panels with 100% of such materials. Panels were produced with nominal density of 0,70 g/cm3, using the urea-formaldehyde resin in a proportion of 10% solids - dry basis weight of the particles and 1% paraffin emulsion. The panels were pressed with a specific pressure of 4,0 MPa, temperature of 140ºC and pressing time of 10 minutes. The results of internal bond met the requirements of the standard EN 312, which indicates that there was an adequate bonding of these particles obtained from discarded furniture. The results of physical and mechanical properties of the panels demonstrated the feasibility of using particles from discarded furniture when producing particleboard, with the possibility of full use of these particles from waste without mixing it with industrial particles of Pinus free from contamination.
DOI: 10.6084/m9.figshare.6179516
title: Effect of pigeon pea intercropping or shading with leucaena plants on the occurrence of the coffee leaf miner and on its predation by wasps in organic coffee plantings

description: ABSTRACT: The infestation of coffee leaf miner and its predation by wasps were assessed in commercial organic coffee plantings shaded with leucaena or intercropped with pigeon pea. Plantings in northern Paraná were assessed every two weeks from June 2011 to December 2012. The percent of infested leaves, number of mines per leaf and the percent of predation by wasps (indicated by lacerations) were determined. Fewer coffee leaf miners and fewer mines per leaf were found in pigeon pea intercropped plantings (28.4% and 0.3, respectively) than in shaded plantings with leucaena (48.1% and 0.8, respectively). More predation by wasps was found in the shaded (27.2%) than in the intercropped (13.2%) plantings. Suggestions for new studies are presented along with suggestions for managing the leaf miner in coffee plantings.
DOI: 10.6084/m9.figshare.6179516.v1
title: Effect of pigeon pea intercropping or shading with leucaena plants on the occurrence of the coffee leaf miner and on its predation by wasps in organic coffee plantings

description: ABSTRACT: The infestation of coffee leaf miner and its predation by wasps were assessed in commercial organic coffee plantings shaded with leucaena or intercropped with pigeon pea. Plantings in northern Paraná were assessed every two weeks from June 2011 to December 2012. The percent of infested leaves, number of mines per leaf and the percent of predation by wasps (indicated by lacerations) were determined. Fewer coffee leaf miners and fewer mines per leaf were found in pigeon pea intercropped plantings (28.4% and 0.3, respectively) than in shaded plantings with leucaena (48.1% and 0.8, respectively). More predation by wasps was found in the shaded (27.2%) than in the intercropped (13.2%) plantings. Suggestions for new studies are presented along with suggestions for managing the leaf miner in coffee plantings.
DOI: 10.6084/m9.figshare.6179513
title: PROPOSAL FOR A SYSTEM OF TREES FALL POTENTIAL RISK ASSESSMENT IN URBAN PARKS1

description: ABSTRACT This study aimed to create a system to assess the potential tree fall risk (SARPQA) and to assess all the trees in the Museum Paraense Emílio Goeldi Zoo (PZB/MPEG) and in the Rodrigues Alves Park/Botanical Garden of Amazônia (BRA/JBA). We analyzed aspects, such as diameter at breast height (DBH), tree total heigh, surface biomass, apparent phytosanitary, stem inclination, canopy balance and presence of lianas. We assessed 1074 trees (DBH e” 20 cm) distributed in 229 species and 40 families. The average stem height, the total height and diameter at breast height were 10.9 m, 18.7 m and 41.9 cm respectively. The SARPQA showed that 23 trees had very high risk of fall, 142 had high risk, 750 individuals had medium and low risk and 159 had very low risk. Both parks have hundreds of large trees, which associated with the amount of people using these spaces, can increase the risk of accidents by tree fall. Trees with high risk of fall need immediate attention because they present risks to human life and/or property. The system proposed in this study proved to be practical and can be an effective tool for decision makers in the management of urban parks.
DOI: 10.6084/m9.figshare.6179513.v1
title: PROPOSAL FOR A SYSTEM OF TREES FALL POTENTIAL RISK ASSESSMENT IN URBAN PARKS1

description: ABSTRACT This study aimed to create a system to assess the potential tree fall risk (SARPQA) and to assess all the trees in the Museum Paraense Emílio Goeldi Zoo (PZB/MPEG) and in the Rodrigues Alves Park/Botanical Garden of Amazônia (BRA/JBA). We analyzed aspects, such as diameter at breast height (DBH), tree total heigh, surface biomass, apparent phytosanitary, stem inclination, canopy balance and presence of lianas. We assessed 1074 trees (DBH e” 20 cm) distributed in 229 species and 40 families. The average stem height, the total height and diameter at breast height were 10.9 m, 18.7 m and 41.9 cm respectively. The SARPQA showed that 23 trees had very high risk of fall, 142 had high risk, 750 individuals had medium and low risk and 159 had very low risk. Both parks have hundreds of large trees, which associated with the amount of people using these spaces, can increase the risk of accidents by tree fall. Trees with high risk of fall need immediate attention because they present risks to human life and/or property. The system proposed in this study proved to be practical and can be an effective tool for decision makers in the management of urban parks.
DOI: 10.6084/m9.figshare.6179501
title: Power radiated by an accelerated electric charge in Minkowski spacetime

description: Abstract In this paper we will use the Classical Fields Theory to address the electromagnetic field and the interaction of an accelerated electric charge with this field in Minkowski spacetime. For this, we first present the mathematical properties of the spacetime in question and the steps to obtain the electromagnetic field equations with source from a lagrangean formulation of that field. Then, we use Green's formalism to find the solutions of the field equations, including the steps to obtain Feynman propagator. Finally, we reach the potential of Liénard-Wiechert and the expressions of the fields of electric and magnetic radiation, presenting later the radiation pattern emitted by a charge in non-relativistic condition, the Larmor formula and its covariant form besides the Liénard's generalization.
DOI: 10.6084/m9.figshare.6179501.v1
title: Power radiated by an accelerated electric charge in Minkowski spacetime

description: Abstract In this paper we will use the Classical Fields Theory to address the electromagnetic field and the interaction of an accelerated electric charge with this field in Minkowski spacetime. For this, we first present the mathematical properties of the spacetime in question and the steps to obtain the electromagnetic field equations with source from a lagrangean formulation of that field. Then, we use Green's formalism to find the solutions of the field equations, including the steps to obtain Feynman propagator. Finally, we reach the potential of Liénard-Wiechert and the expressions of the fields of electric and magnetic radiation, presenting later the radiation pattern emitted by a charge in non-relativistic condition, the Larmor formula and its covariant form besides the Liénard's generalization.
DOI: 10.6084/m9.figshare.6179495
title: SPATIAL DISTRIBUTION OF A POPULATION OF Pentaclethra macroloba (Willd.) KUNTZE IN A FLOODPLAIN FOREST OF THE AMAZON ESTUARY1

description: ABSTRACT We analyzed the spatial distribution pattern of Pentaclethra macroloba to assist in the development of management plans and conservation of this species in estuarine floodplain forests. The study was conducted in an area of floodplain forest of 55.94 ha, in Mazagão, Amapá, Brazil. A census was performed and all individuals of ≥ 30 cm circumference at breast height (CBH), living and dead, were georeferenced. Ripley’s K function was used to analyze the spatial distribution of the population, including mortality and diameter classes. The relationships between distance to the edge of inundation and density and basal area of the population were analyzed using linear regression. We recorded 993 live individuals and 22 dead. The distribution of the population was found to vary with the topographic gradient associated with the distance to the edge of the inundation. Diameter classes 1 (≤ 13.2 cm) and 2 (≤ 18.6 cm) were spatially aggregated close to the water and randomly distributed far from the water. Classes 3 (≤ 24.0 cm) and 4 (≤ 29.5 cm) were aggregated at all distances, and classes 5 (≤ 34.9 cm), 6 (≤ 40.3 cm), 7 (≤ 45.7 cm) and 8 (≤ 51.2 cm), were randomly distributed at all distances. Mortality was randomly distributed. The population density was 18 trees h-1 with a basal area of 49 m2 h-1, and both density (r2=0.51; p=0.0195) and basal area (r2=0.67; p=0.0039) increased with the distance from the edge of the inundation. We conclude that the spatial distribution and successful establishment of this species in floodplain forest are related to the dynamics of flooding and the resultant impacts on dispersal processes.
DOI: 10.6084/m9.figshare.6179495.v1
title: SPATIAL DISTRIBUTION OF A POPULATION OF Pentaclethra macroloba (Willd.) KUNTZE IN A FLOODPLAIN FOREST OF THE AMAZON ESTUARY1

description: ABSTRACT We analyzed the spatial distribution pattern of Pentaclethra macroloba to assist in the development of management plans and conservation of this species in estuarine floodplain forests. The study was conducted in an area of floodplain forest of 55.94 ha, in Mazagão, Amapá, Brazil. A census was performed and all individuals of ≥ 30 cm circumference at breast height (CBH), living and dead, were georeferenced. Ripley’s K function was used to analyze the spatial distribution of the population, including mortality and diameter classes. The relationships between distance to the edge of inundation and density and basal area of the population were analyzed using linear regression. We recorded 993 live individuals and 22 dead. The distribution of the population was found to vary with the topographic gradient associated with the distance to the edge of the inundation. Diameter classes 1 (≤ 13.2 cm) and 2 (≤ 18.6 cm) were spatially aggregated close to the water and randomly distributed far from the water. Classes 3 (≤ 24.0 cm) and 4 (≤ 29.5 cm) were aggregated at all distances, and classes 5 (≤ 34.9 cm), 6 (≤ 40.3 cm), 7 (≤ 45.7 cm) and 8 (≤ 51.2 cm), were randomly distributed at all distances. Mortality was randomly distributed. The population density was 18 trees h-1 with a basal area of 49 m2 h-1, and both density (r2=0.51; p=0.0195) and basal area (r2=0.67; p=0.0039) increased with the distance from the edge of the inundation. We conclude that the spatial distribution and successful establishment of this species in floodplain forest are related to the dynamics of flooding and the resultant impacts on dispersal processes.
DOI: 10.6084/m9.figshare.6179492
title: Clinical Usefulness of Cystatin C to Assess the Prognosis of Acute Coronary Syndromes: A Systematic Review and Meta-Analysis

description: Abstract Cystatin C is used as a marker of renal function and has been shown to be promising for evaluating the prognosis of acute coronary syndromes (ACSs). To evaluate the prognostic value of cystatin C in patients with ACSs. The articles were searched using PubMed, Web of Science and Scielo databases. Observational cohort studies that evaluated the association between increased cystatin C and the development of cardiovascular events and mortality in patients with ACSs were included. Only studies that evaluated similar outcomes, studies that compared the highest with the lowest quartiles of cystatin C, and studies that performed multivariate analysis that included glomerular filtration rate or serum creatinine, were included in the meta-analysis. Methodological quality of the articles was assessed using the Newcastle-Ottawa Scale questionnaire for cohort studies. After applying the eligibility criteria, 17 studies were included in the systematic review. All included studies reported a significant association between higher levels of cystatin C and outcomes. The meta-analysis demonstrated that elevated levels of cystatin C are associated with increased risk of cardiovascular mortality or non-fatal myocardial infarction in patients with ACSs, and such association is independent of renal function [OR = 1.65 (1.464 - 1.861), p &lt; 0.001]. Among the studies included, 4 have good quality and 13 have excellent methodological quality.The systematic review and meta-analysis demonstrated that there is a significant association between increased cystatin C levels and the development of cardiovascular events and mortality in patients with ACSs.
DOI: 10.6084/m9.figshare.6179492.v1
title: Clinical Usefulness of Cystatin C to Assess the Prognosis of Acute Coronary Syndromes: A Systematic Review and Meta-Analysis

description: Abstract Cystatin C is used as a marker of renal function and has been shown to be promising for evaluating the prognosis of acute coronary syndromes (ACSs). To evaluate the prognostic value of cystatin C in patients with ACSs. The articles were searched using PubMed, Web of Science and Scielo databases. Observational cohort studies that evaluated the association between increased cystatin C and the development of cardiovascular events and mortality in patients with ACSs were included. Only studies that evaluated similar outcomes, studies that compared the highest with the lowest quartiles of cystatin C, and studies that performed multivariate analysis that included glomerular filtration rate or serum creatinine, were included in the meta-analysis. Methodological quality of the articles was assessed using the Newcastle-Ottawa Scale questionnaire for cohort studies. After applying the eligibility criteria, 17 studies were included in the systematic review. All included studies reported a significant association between higher levels of cystatin C and outcomes. The meta-analysis demonstrated that elevated levels of cystatin C are associated with increased risk of cardiovascular mortality or non-fatal myocardial infarction in patients with ACSs, and such association is independent of renal function [OR = 1.65 (1.464 - 1.861), p &lt; 0.001]. Among the studies included, 4 have good quality and 13 have excellent methodological quality.The systematic review and meta-analysis demonstrated that there is a significant association between increased cystatin C levels and the development of cardiovascular events and mortality in patients with ACSs.