cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.21076237
title: Sensitivity analysis of design variables of Brazilian dwellings under the effects of climate change

description: Abstract This paper aims to determine global sensitivity indices of design variables in the thermal performance of low-income housing in Belém, Brasília, São Paulo, and Curitiba, in view of the effects of climate change. For this purpose, the thermal performance of a bedroom was simulated in different environmental conditions, from progressions of weather files obtained through the CCWorldWeatherGen tool, for the periods of the years 2020 (2011 to 2040), 2050 (2041 to 2070) and 2080 (2071 to 2100), according to the A2 emissions scenario of the Intergovernmental Panel on Climate Change. The Morris indices showed that climate change impacts not only the thermal performance of the built environment, but also the importance of design variables, especially in cities in milder climates. In Belém, the ventilation factor was most important; in Brasília, the thermal transmittance of the walls and the ventilation factor stood out; and in São Paulo and Curitiba, the solar absorptance of the roof, solar orientation, and the ventilation factor stood out. Due to decisive variations in the sensitivity indices over the years, this study concluded that the building designs must necessarily consider projections of climate change to ensure performance resilience of the built environment.
DOI: 10.6084/m9.figshare.21076237.v1
title: Sensitivity analysis of design variables of Brazilian dwellings under the effects of climate change

description: Abstract This paper aims to determine global sensitivity indices of design variables in the thermal performance of low-income housing in Belém, Brasília, São Paulo, and Curitiba, in view of the effects of climate change. For this purpose, the thermal performance of a bedroom was simulated in different environmental conditions, from progressions of weather files obtained through the CCWorldWeatherGen tool, for the periods of the years 2020 (2011 to 2040), 2050 (2041 to 2070) and 2080 (2071 to 2100), according to the A2 emissions scenario of the Intergovernmental Panel on Climate Change. The Morris indices showed that climate change impacts not only the thermal performance of the built environment, but also the importance of design variables, especially in cities in milder climates. In Belém, the ventilation factor was most important; in Brasília, the thermal transmittance of the walls and the ventilation factor stood out; and in São Paulo and Curitiba, the solar absorptance of the roof, solar orientation, and the ventilation factor stood out. Due to decisive variations in the sensitivity indices over the years, this study concluded that the building designs must necessarily consider projections of climate change to ensure performance resilience of the built environment.
DOI: 10.6084/m9.figshare.21076238
title: Neuro-fuzzy model for the prediction of CO2 emissions of concrete mixes for biodigestors in swine production systems

description: Abstract Due to the importance of swine production in Brazil, there is a need to understand the environmental impact generated by the construction materials used in the production of rural facilities, especially in the construction of biodigesters, as these facilities play an important role in the sustainability of production systems. Considering the relevance of the volume of concrete used in the construction of biodigesters for the management and treatment of swine waste, this research study sought to evaluate the emissions of carbon dioxide equivalent (CO 2 Eq.) in different concrete mix scenarios. For that purpose, a computational ANFIS (Adaptive Neuro-Fuzzy Inference System) model was developed to predict and analyse CO 2 Eq. emissions during the life cycle of materials adopted in conventional concrete. The results indicate that the proper choice of dosage can lead to a reduction of 31.41% in CO 2 Eq. emissions, for concrete from 30 to 40 MPa. This represents a promising proposal for reducing the environmental impact of the production of concrete constructions, which has the potential to stimulate further research in this area.
DOI: 10.6084/m9.figshare.21076238.v1
title: Neuro-fuzzy model for the prediction of CO2 emissions of concrete mixes for biodigestors in swine production systems

description: Abstract Due to the importance of swine production in Brazil, there is a need to understand the environmental impact generated by the construction materials used in the production of rural facilities, especially in the construction of biodigesters, as these facilities play an important role in the sustainability of production systems. Considering the relevance of the volume of concrete used in the construction of biodigesters for the management and treatment of swine waste, this research study sought to evaluate the emissions of carbon dioxide equivalent (CO 2 Eq.) in different concrete mix scenarios. For that purpose, a computational ANFIS (Adaptive Neuro-Fuzzy Inference System) model was developed to predict and analyse CO 2 Eq. emissions during the life cycle of materials adopted in conventional concrete. The results indicate that the proper choice of dosage can lead to a reduction of 31.41% in CO 2 Eq. emissions, for concrete from 30 to 40 MPa. This represents a promising proposal for reducing the environmental impact of the production of concrete constructions, which has the potential to stimulate further research in this area.
DOI: 10.6084/m9.figshare.21076240
title: Window to wall ratio for daylighting and energy efficiency in rooms in the humid tropic

description: Abstract This study aimed to identify the window to floor ratio associated with effective daylighting and energy efficiency in the humid tropics. The rule of thumb most used by architects in preliminary design stages, aiming at adequate natural lighting, addresses window area and room depth. Brazilian building codes determine window to floor ratio values to ensure better natural lighting conditions, but those ratios are not based on scientific works. The method of this study consisted of a comparative analysis of the performance of models regarding useful daylight, daylight uniformity, daylight glare, and energy consumption with lighting and cooling,in order to compare the window to floor ratios under a shaded window, air conditioning, and hybrid lighting. The Daysim and DesignBuilder tools simulated illuminances and energy consumption. Data analysis compared the range of variation in the performance of groups of models, classified by four window-to-floor ratios. The results validated the effectiveness of the 1/6 ratio, but not the 1/8 ratio, both required by Brazilian building codes. The results showed the effectiveness of the 2/6 and 2/8 ratios, which are not included in the codes of cities with hot and humid climates.
DOI: 10.6084/m9.figshare.21076240.v1
title: Window to wall ratio for daylighting and energy efficiency in rooms in the humid tropic

description: Abstract This study aimed to identify the window to floor ratio associated with effective daylighting and energy efficiency in the humid tropics. The rule of thumb most used by architects in preliminary design stages, aiming at adequate natural lighting, addresses window area and room depth. Brazilian building codes determine window to floor ratio values to ensure better natural lighting conditions, but those ratios are not based on scientific works. The method of this study consisted of a comparative analysis of the performance of models regarding useful daylight, daylight uniformity, daylight glare, and energy consumption with lighting and cooling,in order to compare the window to floor ratios under a shaded window, air conditioning, and hybrid lighting. The Daysim and DesignBuilder tools simulated illuminances and energy consumption. Data analysis compared the range of variation in the performance of groups of models, classified by four window-to-floor ratios. The results validated the effectiveness of the 1/6 ratio, but not the 1/8 ratio, both required by Brazilian building codes. The results showed the effectiveness of the 2/6 and 2/8 ratios, which are not included in the codes of cities with hot and humid climates.
DOI: 10.6084/m9.figshare.21076241
title: Assessment of thermal comfort in workstations located near highly glazed façades: solar-adjustment models

description: Abstract Although solar radiation exposure strongly impacts people's thermal comfort, workstations are frequently positioned close to glazed façades. Solar adjustment models have been developed to include the solar radiation impact on people's thermal comfort, which the Fanger and Adaptative models do not address. Nonetheless, those models present differences in their calculation procedures, which have not been thoroughly investigated. This study aims to verify differences in thermal comfort results by applying various solar adjustment models of thermal comfort indices for a person sitting close to a highly glazed façade in an office room. The analyses were based on indoor environment data from computer thermal simulations in EnergyPlus for a temperate climate in Brazil. The results for the same room demonstrated significant differences. For example, the hourly difference between the solar-adjustment models reached 1.7 in PMV, and the MRT was up to 17.6 ºC higher than the mean result calculated through EnergyPlus. The need for solar radiation incidence control is also reinforced. Although the results were not compared with measurement data or people's thermal perception, the limitations and advantages of each solar adjustment model were numerically analysed, broadening the discussions about the solar adjustment models and the consequences of the choices among them.
DOI: 10.6084/m9.figshare.21076243
title: Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding

description: Abstract Sugarcane bagasse ash is a by-product produced by the energy cogeneration from biomass burning. Different processes can be applied to this material to adapt its chemical and physical characteristics to its use as pozzolan. This work aims to evaluate the effectiveness of the densimetric fractionation process in production of sugarcane bagasse ash with high pozzolanicity. Initially, a quartz-rich ash was collected in an industrial boiler and subjected to densimetric fractionation to remove the quartz particles through decantation. Then, the potentially pozzolanic ash portion was subjected to ultrafine grinding. The results showed high amorphous content (94.8%) in the ash after fractionation. Electrical conductivity and performance index tests confirmed the adequate pozzolanicity of the processed ashes. In addition, cement-based pastes with 20% cement replacement by bagasse ash (in mass) showed a reduction in the heat of hydration. Thus, the densimetric fractionation was efficient in producing a material with high reactivity compared to the original ash due to the reduction of contaminants and, consequently, the increase in the amorphous silica concentration.
DOI: 10.6084/m9.figshare.21076243.v1
title: Production of a highly pozzolanic sugarcane bagasse ash via densimetric fractionation and ultrafine grinding

description: Abstract Sugarcane bagasse ash is a by-product produced by the energy cogeneration from biomass burning. Different processes can be applied to this material to adapt its chemical and physical characteristics to its use as pozzolan. This work aims to evaluate the effectiveness of the densimetric fractionation process in production of sugarcane bagasse ash with high pozzolanicity. Initially, a quartz-rich ash was collected in an industrial boiler and subjected to densimetric fractionation to remove the quartz particles through decantation. Then, the potentially pozzolanic ash portion was subjected to ultrafine grinding. The results showed high amorphous content (94.8%) in the ash after fractionation. Electrical conductivity and performance index tests confirmed the adequate pozzolanicity of the processed ashes. In addition, cement-based pastes with 20% cement replacement by bagasse ash (in mass) showed a reduction in the heat of hydration. Thus, the densimetric fractionation was efficient in producing a material with high reactivity compared to the original ash due to the reduction of contaminants and, consequently, the increase in the amorphous silica concentration.
DOI: 10.6084/m9.figshare.21076246
title: Reforming the regulatory reform: general law on independent agencies in Brazil

description: Abstract This paper addresses the effects of the new general law on independent agencies in Brazil. This regulatory reform sought to increase transparency and accountability, strengthen ex-ante evaluation, and improve decision-making. The research objective was to evaluate the possible organizational and institutional consequences of these changes. The study compared data collected from key actors in the 11 agencies referring to the period before the law with the regulatory scenario one year after the law was enacted. The results allow an unprecedented panoramic view of the agencies’ instruments under the inspiration of better regulation, and the new scenario can positively impact these structures’ credibility and trust. The study indicates an advance in the Brazilian regulatory governance model and opens space for future research.
DOI: 10.6084/m9.figshare.21076246.v1
title: Reforming the regulatory reform: general law on independent agencies in Brazil

description: Abstract This paper addresses the effects of the new general law on independent agencies in Brazil. This regulatory reform sought to increase transparency and accountability, strengthen ex-ante evaluation, and improve decision-making. The research objective was to evaluate the possible organizational and institutional consequences of these changes. The study compared data collected from key actors in the 11 agencies referring to the period before the law with the regulatory scenario one year after the law was enacted. The results allow an unprecedented panoramic view of the agencies’ instruments under the inspiration of better regulation, and the new scenario can positively impact these structures’ credibility and trust. The study indicates an advance in the Brazilian regulatory governance model and opens space for future research.
DOI: 10.6084/m9.figshare.21076247
title: HYDROLOGICAL REGIONALIZATION OF THE ANNUAL MAXIMUM STREAMFLOWS OF THE UPPER AND MIDDLE PARAOPEBA RIVER – MG USING THE INDEX-FLOOD TECHNIQUE

description: ABSTRACT Estimating peak streamflows in a basin is an essential issue in hydrology, especially for projects and management of hydraulic infrastructures such as dams, spillways, and bridges. In this context, this article presents a regionalization of annual maximum streamflows for the upper and middle Paraopeba River region in Minas Gerais, proposing a regional equation to calculate maximum streamflows using the index-flood technique by the generalized extreme value (GEV) distribution. GEV distribution parameters were estimated using the L-moments method, and the adjustment of the statistical model was performed by applying the Anderson-Darling test. The results of the hydrological regionalization were compared with those obtained by the local frequency analysis, performed for the considered fluviometric stations, observing absolute deviations from 11.91 to 58.78%.
DOI: 10.6084/m9.figshare.21076247.v1
title: HYDROLOGICAL REGIONALIZATION OF THE ANNUAL MAXIMUM STREAMFLOWS OF THE UPPER AND MIDDLE PARAOPEBA RIVER – MG USING THE INDEX-FLOOD TECHNIQUE

description: ABSTRACT Estimating peak streamflows in a basin is an essential issue in hydrology, especially for projects and management of hydraulic infrastructures such as dams, spillways, and bridges. In this context, this article presents a regionalization of annual maximum streamflows for the upper and middle Paraopeba River region in Minas Gerais, proposing a regional equation to calculate maximum streamflows using the index-flood technique by the generalized extreme value (GEV) distribution. GEV distribution parameters were estimated using the L-moments method, and the adjustment of the statistical model was performed by applying the Anderson-Darling test. The results of the hydrological regionalization were compared with those obtained by the local frequency analysis, performed for the considered fluviometric stations, observing absolute deviations from 11.91 to 58.78%.
DOI: 10.6084/m9.figshare.21076249
title: Emerging standards in civil construction: standardization based on improvisation

description: Abstract Standardisation is a management tool aimed at reducing variability in the production process through a set of rules that determine how a task must be performed. However, there are convergent ideas that parts of the work, not foreseen in the formal standards, emerge through adaptations carried out by the operators themselves andare good solutions for the purposes of standardization. The aim of this article is to understand the nature of these parts of work in construction and to categorize them through a set of constructs that represent their taxonomy. Based on the Design Science Research approach, were carried:an exploratory study developed in a company that assembles and installs custom furniture, an empirical study (EE1) occurred on the activity of laying floors and tiles, and an evaluation study (EE2) carried out on the assembly of pillar’s forms. The first study provided an initial characterization of these parts of the work. The constructs that explain the nature and taxonomy of these parts of the work were identified in the EE1. These parts of the work are called emerging standards (ES). The constructs identified were facilitation of actions and precaution, which were subdivided demonstrating the variety of situations in which ESs can be identified. Finally, the results were validatedin the EE2.
DOI: 10.6084/m9.figshare.21076249.v1
title: Emerging standards in civil construction: standardization based on improvisation

description: Abstract Standardisation is a management tool aimed at reducing variability in the production process through a set of rules that determine how a task must be performed. However, there are convergent ideas that parts of the work, not foreseen in the formal standards, emerge through adaptations carried out by the operators themselves andare good solutions for the purposes of standardization. The aim of this article is to understand the nature of these parts of work in construction and to categorize them through a set of constructs that represent their taxonomy. Based on the Design Science Research approach, were carried:an exploratory study developed in a company that assembles and installs custom furniture, an empirical study (EE1) occurred on the activity of laying floors and tiles, and an evaluation study (EE2) carried out on the assembly of pillar’s forms. The first study provided an initial characterization of these parts of the work. The constructs that explain the nature and taxonomy of these parts of the work were identified in the EE1. These parts of the work are called emerging standards (ES). The constructs identified were facilitation of actions and precaution, which were subdivided demonstrating the variety of situations in which ESs can be identified. Finally, the results were validatedin the EE2.
DOI: 10.6084/m9.figshare.21076250.v1
title: Milling parameters and solid waste characterisation to use as supplementary cementitious materials

description: Abstract Despitethe increasing number of publications on residual raw materials as supplementary cementitious materials (SCM), the milling beneficiation process and its parameters have been underexplored and presented. In this context, this study aims to evaluate the milling parameters for marble, clay tile, clay brick, and phosphogypsum waste processing for recycling as SCM. The raw materials were benefitted by grinding, sieving, and milling in a planetary ball mill, varying the time and rotation speed parameters. The waste was characterised by helium gas pycnometry, DSC, BET specific surface area, XRF, TGA, and XRD/Rietveld. Waste materials in which the mineral composition of phases was formed at higher temperatures were associated with higher demands for specific milling energy and lower grindability indexes. Marble waste (MW) has a mineral composition similar to commercial limestone and phosphogypsum (PG) can be an alternative to natural gypsum in cementitious materials. Clay brick waste (CBW) and clay tile waste (CTW) have the potential to be used as SCM to replace calcined natural clays, although CTW requires higher energy during milling processes.
DOI: 10.6084/m9.figshare.21076250
title: Milling parameters and solid waste characterisation to use as supplementary cementitious materials

description: Abstract Despitethe increasing number of publications on residual raw materials as supplementary cementitious materials (SCM), the milling beneficiation process and its parameters have been underexplored and presented. In this context, this study aims to evaluate the milling parameters for marble, clay tile, clay brick, and phosphogypsum waste processing for recycling as SCM. The raw materials were benefitted by grinding, sieving, and milling in a planetary ball mill, varying the time and rotation speed parameters. The waste was characterised by helium gas pycnometry, DSC, BET specific surface area, XRF, TGA, and XRD/Rietveld. Waste materials in which the mineral composition of phases was formed at higher temperatures were associated with higher demands for specific milling energy and lower grindability indexes. Marble waste (MW) has a mineral composition similar to commercial limestone and phosphogypsum (PG) can be an alternative to natural gypsum in cementitious materials. Clay brick waste (CBW) and clay tile waste (CTW) have the potential to be used as SCM to replace calcined natural clays, although CTW requires higher energy during milling processes.
DOI: 10.6084/m9.figshare.21076252
title: Floor impact noise performance of prefabricated prestressed joists and block slabs with wooden laminate floors

description: Abstract This research aims to discuss and determine acoustic performance values for impact noise insulation (L’nT,w) for 39 floor system compositions that have different resilient materials and wooden laminate floor finishing. The methodology is organized according to ISO 16283-2, ISO 717-2 and NBR 15575-3 for classification. The results obtained demonstrate that the prefabricated ribbed slab with prestressed joists and ceramic slabs, as well as the slab and subfloor system do not meet the minimum requirements for acoustic insulation, comprising values of 91 and 84 dB, respectively. Among the other 37 samples, it is worth mentioning that wooden laminate floors with better abrasion resistance is more efficient concerning acoustic performance, comprising impact noise insulation values ranging from 60 to 62 dB, due to its surface density. In the samples that use resilient materials, the performance values vary from 55 to 46 dB.