cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8227457.v1
title: Antifungal efficiency of chemically and thermally-activated acrylic resins after surface treatment using poly (diallyldimethylammonium chloride)

description: Abstract INTRODUCTION: Acrylic resins are used in the preparation of facial prostheses and may be colonized by fungi. Here, we verified the antifungal efficacy of this material after surface treatment using poly (diallyldimethylammonium chloride). METHODS: Acrylic resin specimens with and without surface treatment were subjected to tests for fungistatic and fungicidal activities. Standard strains of Candida albicans and Aspergillus niger were used. RESULTS: After surface treatment, the fungistatic and fungicidal efficacies of the resins against C. albicans and fungistatic action against A. niger were verified. CONCLUSIONS: The surface treatment was a determinant of the antifungal activity of the material.
DOI: 10.6084/m9.figshare.8227451
title: PROGRAMA MAIS MÉDICOS DO BRASIL: the centrality of the doctor-patient relationship for satisfaction with the program

description: The article examined the factors associated with the satisfaction of the communities served by the Mais Médicos do Brasil Program (PMMB), based on quantitative research carried out by the Ministry of Health and the Federal University of Minas Gerais in 2014, the year in which this program started. The approach occurred through face-to-face interviews, conducted with samples of users and non-users and residents in municipalities registered, but not yet covered. The interviews were carried out in more than 700 cities, segmented into 7 subgroups according to the criteria: 20% of poverty, capital, G100, low income and high economic vulnerability, the metropolitan, quilombolas, special indigenous sanitary district (DSEI) and other locations, totaling more than 18,000 informants. For the analysis of the variables related to evaluation of Mais Médicos, were elaborated descriptive statistics and inferences. Demonstrates, in the initial phase of the program, the majority presence of doctors cooperated (Cubans), the high experience of professionals involved with the basic attention to health, the good quality of medical care and your more Humanized, with the decisive relation between doctor and user to the positive assessment of the program.. It is concluded that the Mais Médicos reached the goals of bringing service to the municipalities of high social vulnerability, where there was still no doctors or your number was small, and that the program has potential for the reconstruction of the concept of the basic attention to health.
DOI: 10.6084/m9.figshare.8227469.v1
title: Longitudinal Aerodynamic and Stability Characteristics of High-Aspect-Ratio Unmanned Aerial Vehicles in Gust Response

description: ABSTRACT The aim of this work is to propose an accurate and reliable numerical simulation method of gust response, so as to analyze longitudinal stability characteristics of high-aspect-ratio unmanned aerial vehicles (UAVs) under gust response. Based on the dual-time stepping method, the unsteady Navies-Stokes equation was solved. By introducing grid velocity to study the effects of gust, the numerical simulation of gust response was realized. Moreover, the numerical simulation method was verified to be accurate by using the theoretical value and reference value obtained in previous research. The calculation results of the high-aspect-ratio UAV under the 1-cos gust reveal that longitudinal aerodynamic forces of high-aspect-ratio UAVs changed. In the whole range of gust gradient length, the UAVs were always in the state of static stability. However, with the increase of gust velocity, static stability margin decreased. The numerical simulation method of gusts established in this study preferably overcomes the possible numerical oscillations and divergence problems caused by excessive gust velocity. The analysis on longitudinal static stability and stability margin of high-aspect-ratio UAVs under the effects of gusts can ensure flight quality and safety of UAVs under the effects of gusts.
DOI: 10.6084/m9.figshare.8227475.v1
title: Soil compaction on traffic lane due to soil tillage and sugarcane mechanical harvesting operations

description: ABSTRACT: Mechanical sugarcane harvesting increases soil compaction due to the intense traffic of agricultural machinery, reducing longevity of sugarcane crops. In order to mitigate the harmful effects caused by agricultural traffic on the soil structure in sugarcane fields, this study evaluated impacts of mechanical sugarcane harvesting on traffic lane under two soil tillage systems based on load bearing capacity models. The experiment was carried out in the region of Piracicaba, state of São Paulo, Brazil, on a Rhodic Nitisol, under conventional tillage (CT) and deep strip-tillage (DST). For CT soil tillage was applied to the entire area with a heavy disk harrow, at operating depths from 0.20 to 0.30 m followed by a leveling harrow at a depth of 0.15 m. For DST, soil tillage was performed in part of the area at a depth of 0.80 m, forming strip beds for sugarcane planting, while the traffic lanes were not disturbed. Undisturbed soil samples from traffic lanes were used in the uniaxial compression test to quantify preconsolidation pressure and to model the soil load bearing capacity. The surface layer (0.00-0.10 m) was most susceptible to compaction, regardless of the tillage system (CT or DST) used. In the DST, the traffic lane maintained the previous soil stress history and presented higher load bearing capacity (LBC) than the traffic lane in the CT. As in CT the soil was tilled, the stress history was discontinued. This larger LBC in DTS minimized the impacts of the sugarcane harvest. Under CT, additional soil compaction due to mechanical sugarcane harvesting in the traffic lane was observed after the second sugarcane harvest. There was a reduction in load bearing capacity from 165 kPa to 68 kPa under CT and from 230 kPa to 108 kPa under DST, from the first to the second harvest at surface layer. Water content at mechanical harvesting was the most relevant factor to maximize impacts on the soil structure in traffic lanes, for both tillage systems.
DOI: 10.6084/m9.figshare.8227445
title: Reservoir destratification via artificial aeration

description: ABSTRACT In the present work, the destratification process of water column using diffused-aeration was evaluated at laboratorial scale by mathematical modelling. Two flow patterns were identified, a plume regime, in which the bubble-induced flow penetrates the interface (density gradient) and rises to the water surface, and a fountain regime, in which the flow partially penetrates the interface and collapses to form an intermediate-density layer. The experimental results showed that the plume regime promotes a faster mixing of the upper layer (epilimnion) than the fountain regime. However, the mixing times of the lower layer (hypolimnion) were practically the same for both regimes. After adjusting the parameters that describe the entrainment of the ambient fluid into the plume and fountain, it was possible to simulate the process of water column destratification with good adherence to the experimental data obtained in this research and previous studies. Finally, the validated model was applied to simulate the impact of different airflow rates on the reservoir destratification process’ (real scale) time evolution, and the possible implications for the water quality of these water bodies were discussed.
DOI: 10.6084/m9.figshare.8227439
title: Management of solid organic waste in Brazil: from legal ordinance to reality

description: ABSTRACT In Brazil, millions of tons of solid organic wastes are still burnt or thrown into open dumps daily due to the lack of knowledge about their potential and the impacts they cause when improperly arranged. This paper aims to analyze the integration and application of the principles and objectives of the National Solid Waste Policy on the management of organic waste in the National Plan for Solid Waste and in the Multi-Year Plans of the Union Budget allocation. Unfortunately, it was observed that the law didn´t observe organic wastes, since it has no specific programs or planned actions. The valuation of organic wastes can help solve serious environmental problems, such as soil degradation, erosion, climate change, and divert large amounts of such waste sent to landfills and open dumps in Brazil. Cities, businesses and agriculture are greatly benefited by considering their organic “garbage” as a precious “resource”, converting it into fertilizer and/or energy, generating jobs and reducing the cost of their disposal. Therefore, in addition to improving the infrastructure for composting and biomethanization, we must invest intensively in programs to reduce food waste, which will result in smaller volumes to be recycled.
DOI: 10.6084/m9.figshare.8227445.v1
title: Reservoir destratification via artificial aeration

description: ABSTRACT In the present work, the destratification process of water column using diffused-aeration was evaluated at laboratorial scale by mathematical modelling. Two flow patterns were identified, a plume regime, in which the bubble-induced flow penetrates the interface (density gradient) and rises to the water surface, and a fountain regime, in which the flow partially penetrates the interface and collapses to form an intermediate-density layer. The experimental results showed that the plume regime promotes a faster mixing of the upper layer (epilimnion) than the fountain regime. However, the mixing times of the lower layer (hypolimnion) were practically the same for both regimes. After adjusting the parameters that describe the entrainment of the ambient fluid into the plume and fountain, it was possible to simulate the process of water column destratification with good adherence to the experimental data obtained in this research and previous studies. Finally, the validated model was applied to simulate the impact of different airflow rates on the reservoir destratification process’ (real scale) time evolution, and the possible implications for the water quality of these water bodies were discussed.
DOI: 10.6084/m9.figshare.8227451.v1
title: PROGRAMA MAIS MÉDICOS DO BRASIL: the centrality of the doctor-patient relationship for satisfaction with the program

description: The article examined the factors associated with the satisfaction of the communities served by the Mais Médicos do Brasil Program (PMMB), based on quantitative research carried out by the Ministry of Health and the Federal University of Minas Gerais in 2014, the year in which this program started. The approach occurred through face-to-face interviews, conducted with samples of users and non-users and residents in municipalities registered, but not yet covered. The interviews were carried out in more than 700 cities, segmented into 7 subgroups according to the criteria: 20% of poverty, capital, G100, low income and high economic vulnerability, the metropolitan, quilombolas, special indigenous sanitary district (DSEI) and other locations, totaling more than 18,000 informants. For the analysis of the variables related to evaluation of Mais Médicos, were elaborated descriptive statistics and inferences. Demonstrates, in the initial phase of the program, the majority presence of doctors cooperated (Cubans), the high experience of professionals involved with the basic attention to health, the good quality of medical care and your more Humanized, with the decisive relation between doctor and user to the positive assessment of the program.. It is concluded that the Mais Médicos reached the goals of bringing service to the municipalities of high social vulnerability, where there was still no doctors or your number was small, and that the program has potential for the reconstruction of the concept of the basic attention to health.
DOI: 10.6084/m9.figshare.8227436
title: Oceanographic Features Detected on MODIS Images Under Sunglint Condition: Examples at the Brazilian Southeastern Coast

description: Abstract Optical/near-infrared remote sensing images acquired by remote sensors in specular bidirectional reflection conditions between sun, sea surface and sensor (sunglint condition) can be used to identify oceanographic and meteorological features and processes at work on the surface of the sea at the time of image acquisition. Moderate Resolution Imaging Spectroradiometer (MODIS) images in sunglint conditions over the Brazilian Southeastern continental shelf were digitally processed and analyzed allowing identify features as the Brazil Current front, mesoscale eddies and meanders, internal solitary waves, atmospheric rolls, biogenic and mineral surface slicks. Base on the understanding about these ocean and atmospheric process and the mechanism which allow us to distinguish these features in sunglint contaminated images. As highlighted here, it is possible to do a better and more detailed interpretation of complex features visible in such images, information that can be applied in operational oceanography, as well as to obtain a better understanding of marine environment processes. The atmospheric correction more suitable to sunglint conditions are here descripted too. As well, the sunglint condition dependence of favorable solar zenith angles which partially restrict its geometry of acquisition (sun, sensor and sea surface) between October and February at the Brazilian Southeastern coast.
DOI: 10.6084/m9.figshare.8227439.v1
title: Management of solid organic waste in Brazil: from legal ordinance to reality

description: ABSTRACT In Brazil, millions of tons of solid organic wastes are still burnt or thrown into open dumps daily due to the lack of knowledge about their potential and the impacts they cause when improperly arranged. This paper aims to analyze the integration and application of the principles and objectives of the National Solid Waste Policy on the management of organic waste in the National Plan for Solid Waste and in the Multi-Year Plans of the Union Budget allocation. Unfortunately, it was observed that the law didn´t observe organic wastes, since it has no specific programs or planned actions. The valuation of organic wastes can help solve serious environmental problems, such as soil degradation, erosion, climate change, and divert large amounts of such waste sent to landfills and open dumps in Brazil. Cities, businesses and agriculture are greatly benefited by considering their organic “garbage” as a precious “resource”, converting it into fertilizer and/or energy, generating jobs and reducing the cost of their disposal. Therefore, in addition to improving the infrastructure for composting and biomethanization, we must invest intensively in programs to reduce food waste, which will result in smaller volumes to be recycled.
DOI: 10.6084/m9.figshare.8227433
title: Background Error Covariance Matrix Applied to the Global Data Assimilation System at CPTEC: Single Observation Experiments

description: Abstract The background error covariance matrix represents a key component of a data assimilation system. It can be shown mathematically that the analysis increments are directly proportional to the covariance matrix. As a result it is correct to state that the performance of a data assimilation system is related to the characteristics of the covariance matrix, in terms of: horizontal and vertical length scales, standard deviations and variances. Considering the information that the data assimilation system uses the observations to correct the model forecasts weighting the model and observations errors, thus the use of an unadjusted covariance matrix can impact the resulting analysis at a great level. At CPTEC efforts has been made in order to adjust the covariance matrix for its application at the operations. In this work it is presented a conceptual overview on the subject, enlightening the importance of the background error covariance matrix and how it is treated in an operational data assimilation system. Furthermore, it is also made a quantitative and qualitative characterization of the background error covariance matrix calculated using the CPTEC global forecast model and the differences in the resulting analysis increments.
DOI: 10.6084/m9.figshare.8227427
title: Procurement 4.0: How the digital disruption supports cost-reduction in Procurement

description: Abstract Paper aims “Without purchasing, Industry 4.0 will not take place”. Procurement ensures supplies at the lowest level of costs. Those costs account for more than 50% of the gross production value. This paper analyses, explains and proves that digitization reduces cost even further. Originality This empirical examination as well as the explanatory approach are key supplements to previous survey-based studies on the effect of digitization on procurement costs. Research method The digitized procurement process and the application of technologies were analysed in detail by establishing a Procurement 4.0-Framework in order to prove evidence of digitally induced cost-cutting effects. The hypothesis that the use of Industry 4.0-Technologies leads to cost reductions is empirically tested with data by the federal statistical office. The Pearson correlation coefficient measures the strength of correlation between the degree of technology usage and costs of material and commodities. The correlations are empirically tested using a t-test. Main findings The correlations’ strength between digitization and the development of procurement costs enables to confirm the hypothesis and allows an in-depth analysis of technology-specific effects based on a Procurement 4.0-Framework. Implications for theory and practice This paper effectively supports the implementation of technologies for the reduction of costs.
DOI: 10.6084/m9.figshare.8227436.v1
title: Oceanographic Features Detected on MODIS Images Under Sunglint Condition: Examples at the Brazilian Southeastern Coast

description: Abstract Optical/near-infrared remote sensing images acquired by remote sensors in specular bidirectional reflection conditions between sun, sea surface and sensor (sunglint condition) can be used to identify oceanographic and meteorological features and processes at work on the surface of the sea at the time of image acquisition. Moderate Resolution Imaging Spectroradiometer (MODIS) images in sunglint conditions over the Brazilian Southeastern continental shelf were digitally processed and analyzed allowing identify features as the Brazil Current front, mesoscale eddies and meanders, internal solitary waves, atmospheric rolls, biogenic and mineral surface slicks. Base on the understanding about these ocean and atmospheric process and the mechanism which allow us to distinguish these features in sunglint contaminated images. As highlighted here, it is possible to do a better and more detailed interpretation of complex features visible in such images, information that can be applied in operational oceanography, as well as to obtain a better understanding of marine environment processes. The atmospheric correction more suitable to sunglint conditions are here descripted too. As well, the sunglint condition dependence of favorable solar zenith angles which partially restrict its geometry of acquisition (sun, sensor and sea surface) between October and February at the Brazilian Southeastern coast.
DOI: 10.6084/m9.figshare.8227433.v1
title: Background Error Covariance Matrix Applied to the Global Data Assimilation System at CPTEC: Single Observation Experiments

description: Abstract The background error covariance matrix represents a key component of a data assimilation system. It can be shown mathematically that the analysis increments are directly proportional to the covariance matrix. As a result it is correct to state that the performance of a data assimilation system is related to the characteristics of the covariance matrix, in terms of: horizontal and vertical length scales, standard deviations and variances. Considering the information that the data assimilation system uses the observations to correct the model forecasts weighting the model and observations errors, thus the use of an unadjusted covariance matrix can impact the resulting analysis at a great level. At CPTEC efforts has been made in order to adjust the covariance matrix for its application at the operations. In this work it is presented a conceptual overview on the subject, enlightening the importance of the background error covariance matrix and how it is treated in an operational data assimilation system. Furthermore, it is also made a quantitative and qualitative characterization of the background error covariance matrix calculated using the CPTEC global forecast model and the differences in the resulting analysis increments.
DOI: 10.6084/m9.figshare.8227424
title: Beliefs on the teacher professionalism and teaching models in initial teacher education

description: ABSTRACT The aim of this paper is to know student teachers’ beliefs on the teaching profession as well as its relation with diverse teaching methods. A Likert scale questionnaire collected the opinions of 361 students enrolled in the master’s degree in secondary education teacher training. A descriptive methodology was applied through a questionnaire in order to collect the data. The most extended beliefs concerning the teaching profession are identified, emphasising future teachers’ interests in more practical teaching and student-centred approach. This investigation highlights the importance of including within the curriculum of pre-service secondary education teachers, activities that enable students reflect about their own beliefs regarding the teaching profession for the reasons that they are decisive to introduce changes in the teacher training curriculum.
DOI: 10.6084/m9.figshare.8227427.v1
title: Procurement 4.0: How the digital disruption supports cost-reduction in Procurement

description: Abstract Paper aims “Without purchasing, Industry 4.0 will not take place”. Procurement ensures supplies at the lowest level of costs. Those costs account for more than 50% of the gross production value. This paper analyses, explains and proves that digitization reduces cost even further. Originality This empirical examination as well as the explanatory approach are key supplements to previous survey-based studies on the effect of digitization on procurement costs. Research method The digitized procurement process and the application of technologies were analysed in detail by establishing a Procurement 4.0-Framework in order to prove evidence of digitally induced cost-cutting effects. The hypothesis that the use of Industry 4.0-Technologies leads to cost reductions is empirically tested with data by the federal statistical office. The Pearson correlation coefficient measures the strength of correlation between the degree of technology usage and costs of material and commodities. The correlations are empirically tested using a t-test. Main findings The correlations’ strength between digitization and the development of procurement costs enables to confirm the hypothesis and allows an in-depth analysis of technology-specific effects based on a Procurement 4.0-Framework. Implications for theory and practice This paper effectively supports the implementation of technologies for the reduction of costs.