cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7512677
title: Investigating cardiolocomotor synchronization during running in trained and untrained males

description: Introduction This study aims at investigating the coupling of the cardiac and locomotor systems during running in trained and untrained males. Methods Sixteen healthy young males subjects were submitted to an anthropometric evaluation, followed by a treadmill test at 70% to 75% of heart rate reserve. Based on the average velocity, they were divided into two groups of eight, trained group (TG) and untrained group (UT). The electrocardiogram and the electromyogram of the vastus lateralis muscle of the right thigh were digitized at a sampling rate of 1000 Hz, and processed off-line. Each cardiac and electromyographic cycle was detected to further investigate the coupling between cardiac and running rates in time domain, using the cross-correlation, and in the frequency domain, using a phase synchronization measure based on the Hilbert transform. A Shannon entropy index and magnitude squared coherence were also applied to improve analysis. Results Both groups presented low cross-correlation (0.18 ± 0.07 TG and 0.15 ± 0.08 UG) values between these signals, and only four from 16 subjects presented short epochs of phase synchronization (4.1 ± 8.6% TG and 3.2±7.3% UG) between signals, occurring at a low frequency band and random phase differences. The low to moderate coherence (0.67 ± 0.16 TG and 0.64 ± 0.16 UG) observed at 0.1 Hz appears to be an effect of the simultaneous action of sympathetic system over both cardiac and muscular rhythms. Conclusion The combined results suggest that the chosen exercise protocol was not able to cause cardiolocomotor synchronization.
DOI: 10.6084/m9.figshare.5670334
title: Evaluation of Bambusa vulgaris Energy Potential Based on Age

description: ABSCTRACT This study aimed to perform an energy evaluation of Bambusa vulgaris ex JC Wendl. var. vulgaris for ages 1, 2 and 3 years old. Samples from the positions along the stem (base, middle and top) were collected in commercial plantation, managed for energy production. The content of volatile material, ash and fixed carbon, high heat combustion, basic density and energy density, content of extract, holocelulose and the total lignin of B. vulgaris were determined. The results indicate that the age of 1 to 3 years old showed increased ash content, basic density and energy density, reduction of volatile material, fixed carbon content and heat combustion. And also indicate increased ash content, basic density and energy density; decreased volatile material, fixed carbon content and heat combustion from base to top. Considering the energy density as the best, we can say that the quality of Bambusa vulgaris biomass as energy input improves with increasing age and the upper portions of the stemsproduce more energy per unit volume.
DOI: 10.6084/m9.figshare.5670334.v1
title: Evaluation of Bambusa vulgaris Energy Potential Based on Age

description: ABSCTRACT This study aimed to perform an energy evaluation of Bambusa vulgaris ex JC Wendl. var. vulgaris for ages 1, 2 and 3 years old. Samples from the positions along the stem (base, middle and top) were collected in commercial plantation, managed for energy production. The content of volatile material, ash and fixed carbon, high heat combustion, basic density and energy density, content of extract, holocelulose and the total lignin of B. vulgaris were determined. The results indicate that the age of 1 to 3 years old showed increased ash content, basic density and energy density, reduction of volatile material, fixed carbon content and heat combustion. And also indicate increased ash content, basic density and energy density; decreased volatile material, fixed carbon content and heat combustion from base to top. Considering the energy density as the best, we can say that the quality of Bambusa vulgaris biomass as energy input improves with increasing age and the upper portions of the stemsproduce more energy per unit volume.
DOI: 10.6084/m9.figshare.5671471
title: Influence of Wood Stack Dimensional Parameters in Quality of Eucalyptus spp. Submitted to Air Drying

description: ABSTRACT This study aimed to evaluate the influence of the width of the sawn timber stack and thickness of the stickers in the drying velocity, the generated defects and moisture distribution within the stack in Eucalyptus spp.. Two widths of stacks were tested (1800 and 900 mm), both 3000 mm long, constructed with 20 and 25 mm thick stickers. We evaluated the drying rate, final moisture in distribution and main defects generated after 90 days of air drying. Reducing the width of the stack caused an increase in drying velocity, the most satisfactory results for the timber stack made with 25 mm thickness. The reduction of the wood stack width influenced the quality of Eucalyptus spp. after air drying, showing a decrease of the final moisture of the lumber boards. The moisture variation between the boards and the defects generated were below the limits set by default.
DOI: 10.6084/m9.figshare.7512677.v1
title: Investigating cardiolocomotor synchronization during running in trained and untrained males

description: Introduction This study aims at investigating the coupling of the cardiac and locomotor systems during running in trained and untrained males. Methods Sixteen healthy young males subjects were submitted to an anthropometric evaluation, followed by a treadmill test at 70% to 75% of heart rate reserve. Based on the average velocity, they were divided into two groups of eight, trained group (TG) and untrained group (UT). The electrocardiogram and the electromyogram of the vastus lateralis muscle of the right thigh were digitized at a sampling rate of 1000 Hz, and processed off-line. Each cardiac and electromyographic cycle was detected to further investigate the coupling between cardiac and running rates in time domain, using the cross-correlation, and in the frequency domain, using a phase synchronization measure based on the Hilbert transform. A Shannon entropy index and magnitude squared coherence were also applied to improve analysis. Results Both groups presented low cross-correlation (0.18 ± 0.07 TG and 0.15 ± 0.08 UG) values between these signals, and only four from 16 subjects presented short epochs of phase synchronization (4.1 ± 8.6% TG and 3.2±7.3% UG) between signals, occurring at a low frequency band and random phase differences. The low to moderate coherence (0.67 ± 0.16 TG and 0.64 ± 0.16 UG) observed at 0.1 Hz appears to be an effect of the simultaneous action of sympathetic system over both cardiac and muscular rhythms. Conclusion The combined results suggest that the chosen exercise protocol was not able to cause cardiolocomotor synchronization.
DOI: 10.6084/m9.figshare.8227409
title: New urban policies, new forms of social participation? The challenges of the Água Espraiada Urban Consortium Operation in São Paulo, Brazil

description: Abstract Urban consortium operation is a Brazilian instrument to implement large urban projects. It aims to promote urban services and infrastructure in a specific perimeter by selling construction benefits, which include changes in land uses and building rights. The list of works, their priority and overall development should be debated in management councils representing the diversity of stakeholders involved in the project. Focusing on the Água Espraiada Urban Consortium Operation in São Paulo, this paper analyses the work of its management committee from 2001 to 2014 and exposes disputes among different stakeholders, as well as their strategies and challenges to effective participation. Ultimately, what was supposed to be an arena for democratic decision-making has become an informative arena that legitimizes the project.
DOI: 10.6084/m9.figshare.5671471.v1
title: Influence of Wood Stack Dimensional Parameters in Quality of Eucalyptus spp. Submitted to Air Drying

description: ABSTRACT This study aimed to evaluate the influence of the width of the sawn timber stack and thickness of the stickers in the drying velocity, the generated defects and moisture distribution within the stack in Eucalyptus spp.. Two widths of stacks were tested (1800 and 900 mm), both 3000 mm long, constructed with 20 and 25 mm thick stickers. We evaluated the drying rate, final moisture in distribution and main defects generated after 90 days of air drying. Reducing the width of the stack caused an increase in drying velocity, the most satisfactory results for the timber stack made with 25 mm thickness. The reduction of the wood stack width influenced the quality of Eucalyptus spp. after air drying, showing a decrease of the final moisture of the lumber boards. The moisture variation between the boards and the defects generated were below the limits set by default.
DOI: 10.6084/m9.figshare.7243856
title: Elimination of chemical oxygen demand from domestic residual water by electrocoagulation with aluminum and iron electrodes

description: Abstract This research determined the efficiency of removal of chemical oxygen demand (COD) by an electrocoagulation process. An electrocoagulation reactor with aluminum and iron electrodes was used to treat water from the treatment plant of the Research Center for Wastewater Treatment and Hazardous Waste. The COD removal percentage was a response variable for the experimental factorial design. The factors influencing the process were current intensity, treatment time, and pH. The best results in the percentage of removal of the COD were very similar to that obtained at a pH of 8.2 and 7, with values of 83% and 84%, respectively, with a current intensity of 7 A and a treatment time of 15 min. However, at 5 A and 10 min, values that exceed 80% removal were obtained. Statistical analysis indicates that only current intensity and time were significant for the response variable. Electrocoagulation is a viable process for the treatment of this type of effluent, in addition to being more versatile compared with biological processes.
DOI: 10.6084/m9.figshare.7243856.v1
title: Elimination of chemical oxygen demand from domestic residual water by electrocoagulation with aluminum and iron electrodes

description: Abstract This research determined the efficiency of removal of chemical oxygen demand (COD) by an electrocoagulation process. An electrocoagulation reactor with aluminum and iron electrodes was used to treat water from the treatment plant of the Research Center for Wastewater Treatment and Hazardous Waste. The COD removal percentage was a response variable for the experimental factorial design. The factors influencing the process were current intensity, treatment time, and pH. The best results in the percentage of removal of the COD were very similar to that obtained at a pH of 8.2 and 7, with values of 83% and 84%, respectively, with a current intensity of 7 A and a treatment time of 15 min. However, at 5 A and 10 min, values that exceed 80% removal were obtained. Statistical analysis indicates that only current intensity and time were significant for the response variable. Electrocoagulation is a viable process for the treatment of this type of effluent, in addition to being more versatile compared with biological processes.
DOI: 10.6084/m9.figshare.7677680
title: A review of the benefits for comminution circuits offered by rock blasting

description: Abstract Rock blasting is the first phase of comminution, completed by mechanical means downstream in the crushing and milling phases. Nevertheless, mineral processers and blasters seldom work together. The total energy of mechanical comminution depends on feeding grain size and on the internal resistance of the material to grinding. Blasting heavily influences both of these aspects: i) it induces visible fracturing: this is the particle size distribution visible to the naked eye, that is measurable by means of image analysis or sieving; ii) it induces invisible fracturing: this is the system of micro-fractures, invisible to the naked eye, that are detectable only by microscopic analysis but show their direct effect by reducing the grinding energy ("softens" the material). A proper management of blasting can greatly benefit the comminution circuit. In this article, the author analyzes data from literature and from field experiments and discusses the benefits that rock blasting can produce for the comminution process.
DOI: 10.6084/m9.figshare.8227409.v1
title: New urban policies, new forms of social participation? The challenges of the Água Espraiada Urban Consortium Operation in São Paulo, Brazil

description: Abstract Urban consortium operation is a Brazilian instrument to implement large urban projects. It aims to promote urban services and infrastructure in a specific perimeter by selling construction benefits, which include changes in land uses and building rights. The list of works, their priority and overall development should be debated in management councils representing the diversity of stakeholders involved in the project. Focusing on the Água Espraiada Urban Consortium Operation in São Paulo, this paper analyses the work of its management committee from 2001 to 2014 and exposes disputes among different stakeholders, as well as their strategies and challenges to effective participation. Ultimately, what was supposed to be an arena for democratic decision-making has become an informative arena that legitimizes the project.
DOI: 10.6084/m9.figshare.7677680.v1
title: A review of the benefits for comminution circuits offered by rock blasting

description: Abstract Rock blasting is the first phase of comminution, completed by mechanical means downstream in the crushing and milling phases. Nevertheless, mineral processers and blasters seldom work together. The total energy of mechanical comminution depends on feeding grain size and on the internal resistance of the material to grinding. Blasting heavily influences both of these aspects: i) it induces visible fracturing: this is the particle size distribution visible to the naked eye, that is measurable by means of image analysis or sieving; ii) it induces invisible fracturing: this is the system of micro-fractures, invisible to the naked eye, that are detectable only by microscopic analysis but show their direct effect by reducing the grinding energy ("softens" the material). A proper management of blasting can greatly benefit the comminution circuit. In this article, the author analyzes data from literature and from field experiments and discusses the benefits that rock blasting can produce for the comminution process.
DOI: 10.6084/m9.figshare.7517741
title: Estimating of the Volume of Eucalyptus with Kriging and Cokriging in Semi-arid of Pernambuco

description: ABSTRACT The volumes of 1875 eucalyptus plantation trees were strictly cubed by Smalian process, thus knowing the total volume of planting of 166.14 m3, the trees were located on a plane (X, Y) and two geostatistical techniques were applied, kriging and cokriging. For cokriging was used as the secondary variable (DBH) diameter at breast height of the entire population, variable with high correlation with the volume of Eucalyptus wood. Three sizes of samples were taken - 200, 100 and 50 - and the estimates of the volumes were performed for each sample using both geostatistical techniques. The sample size did not affect the estimates of the total volume of planting. The cokriging provided better results than kriging for the smaller samples. The maps of spatial distribution volume were constructed.
DOI: 10.6084/m9.figshare.7517741.v1
title: Estimating of the Volume of Eucalyptus with Kriging and Cokriging in Semi-arid of Pernambuco

description: ABSTRACT The volumes of 1875 eucalyptus plantation trees were strictly cubed by Smalian process, thus knowing the total volume of planting of 166.14 m3, the trees were located on a plane (X, Y) and two geostatistical techniques were applied, kriging and cokriging. For cokriging was used as the secondary variable (DBH) diameter at breast height of the entire population, variable with high correlation with the volume of Eucalyptus wood. Three sizes of samples were taken - 200, 100 and 50 - and the estimates of the volumes were performed for each sample using both geostatistical techniques. The sample size did not affect the estimates of the total volume of planting. The cokriging provided better results than kriging for the smaller samples. The maps of spatial distribution volume were constructed.
DOI: 10.6084/m9.figshare.7517756
title: Litter Stock in Three Forest Types in Cerrado at Distrito Federal

description: ABSTRACT The aim of this study was to evaluate the monthly and annual litter stock, and the seasonality in two phytophysiognomies (Cerrado stricto sensu and Gallery Forest) and one eucalyptus plantation, located in Fazenda Água Limpa, DF. The litter stock was monthly collected by using a metal jig of 0.25 m2, during one year. The material was manually sorted into leaves, bark, twigs, roots, flowers/fruits and particulate matter. There were no significant differences in the litter stock between the Gallery Forest (9.36 t ha-1) and the eucalyptus plantation (9.12 t ha-1), which were both higher than the Cerrado stricto sensu (6.08 t ha-1). The leaf fraction presented a larger amount in the three vegetation types when compared to the other fractions. There were two different patterns of litter stock seasonality: higher litter stock in the Cerrado stricto sensu and eucalyptus plantation in the dry season; and higher stock in Gallery Forest in the rainy season.
DOI: 10.6084/m9.figshare.7517756.v1
title: Litter Stock in Three Forest Types in Cerrado at Distrito Federal

description: ABSTRACT The aim of this study was to evaluate the monthly and annual litter stock, and the seasonality in two phytophysiognomies (Cerrado stricto sensu and Gallery Forest) and one eucalyptus plantation, located in Fazenda Água Limpa, DF. The litter stock was monthly collected by using a metal jig of 0.25 m2, during one year. The material was manually sorted into leaves, bark, twigs, roots, flowers/fruits and particulate matter. There were no significant differences in the litter stock between the Gallery Forest (9.36 t ha-1) and the eucalyptus plantation (9.12 t ha-1), which were both higher than the Cerrado stricto sensu (6.08 t ha-1). The leaf fraction presented a larger amount in the three vegetation types when compared to the other fractions. There were two different patterns of litter stock seasonality: higher litter stock in the Cerrado stricto sensu and eucalyptus plantation in the dry season; and higher stock in Gallery Forest in the rainy season.
DOI: 10.6084/m9.figshare.7186913.v1
title: Use of statistical multivariate analysis to identify sources emitting particulate matter in Belo Horizonte, Brazil

description: Abstract Particulate matter is the mixture of solid and liquid particles. It may at times cause adverse effects to human health, in the climate, ecosystem and materials. The objective of this study was to identify the sources emitting particulate matter that contributes to environmental pollution at two sites in Belo Horizonte city. The metropolitan region of Belo Horizonte is characterized by numerous mining activities and other industries, high population and, consequently, a high number of vehicles. There are therefore several sources emitting pollutants into the atmosphere. Airborne particulate matter was collected in air filters during approximately one year using a high-volume sampler in strategic points. The concentration of particulate matter results showed that, in general, the values were 40% higher than the values recommended by legislation. During the summer rainy season, no sample exceeded the recommended limits at both sampling sites. The elemental composition was determined through neutron activation analysis and these values were considered variables in the multivariate statistical analysis for the identification of the main sources of particle emission and their contributions. The results confirmed a significant influence of the soil and motor vehicles in the degradation of the region’s air quality.
DOI: 10.6084/m9.figshare.7186913
title: Use of statistical multivariate analysis to identify sources emitting particulate matter in Belo Horizonte, Brazil

description: Abstract Particulate matter is the mixture of solid and liquid particles. It may at times cause adverse effects to human health, in the climate, ecosystem and materials. The objective of this study was to identify the sources emitting particulate matter that contributes to environmental pollution at two sites in Belo Horizonte city. The metropolitan region of Belo Horizonte is characterized by numerous mining activities and other industries, high population and, consequently, a high number of vehicles. There are therefore several sources emitting pollutants into the atmosphere. Airborne particulate matter was collected in air filters during approximately one year using a high-volume sampler in strategic points. The concentration of particulate matter results showed that, in general, the values were 40% higher than the values recommended by legislation. During the summer rainy season, no sample exceeded the recommended limits at both sampling sites. The elemental composition was determined through neutron activation analysis and these values were considered variables in the multivariate statistical analysis for the identification of the main sources of particle emission and their contributions. The results confirmed a significant influence of the soil and motor vehicles in the degradation of the region’s air quality.
DOI: 10.6084/m9.figshare.11390664
title: STRUCTURAL AND PRODUCTIVE CHARACTERISTICS IN INTRASPECIFIC AND INTERSPECIFIC HYBRIDS OF ELEPHANTGRASS

description: Abstract The objective of this study was to evaluate the structure and forage production of hybrids of elephant-grass managed under cut. Twenty-four clones of elephant-grass from Embrapa dairy cattle were used as treatments, and Cameroom as a control. The grasses were cut close to the ground, every 60 days. The parameters evaluated were yield and dry matter content, number of basal tillers, number of leaves per tiller, plant height, stem diameter. The highest height of the plants was observed in clone CNPGL 00-103-1. The group with the highest number of tillers had three clones and a mean of 39.38 tiller m-2. In the group of clones CNPGL 00-103-1, CNPGL 93-25-3, CNPGL 00-16-1 and CNPGL 00-90-3 the highest dry matter contents (22.7% DM) were observed. The highest masses of forage, leaf blade and stem were observed in clone CNPGL 00-214, 15852 and 6195 kg ha-1 DM, respectively. The highest leaf blade / stem ratio was of the CNPGL 00-201-1 clone, and only in this did the leaf blade mass exceed that of the stem. Clone CNPGL 00-214 showed to be more productive, with high tillering capacity and forage accumulation.
DOI: 10.6084/m9.figshare.7519436
title: Teak Stump Sprouting Capacity Under Compound Coppice Regime Process

description: ABSTRACT This work aimed to evaluate the teak stump sprouting capacity under compound coppice process. The experiment was implemented at spacing of 3.0 × 2.0 m and 3.0 × 3.0 m. At 8-years old, the experiment was systematically thinned in 50%. After thinning, with new spacing of 3.0 × 4.0 m and 3.0 × 6.0 m, the stump sprouting capacity of the thinned trees was evaluated. The experimental design used was randomized blocks, whit two treatments and 5 repetitions. The treatments were T1 = conduced sprouting under compound coppice process at the spacing 3.0 × 4.0 m and T2 = conduced sprouting under compound coppice at the spacing 3.0 × 6.0 m. Teak presented sprouting capacity under compound coppice until 12-years old for both treatments.