cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7244864
title: Determination of drinking water consumption during the construction of houses in a semi-desert area of Chile

description: ABSTRACT In recent years, water scarcity in northern Chile has increased markedly, leading to an over exploitation of groundwater aquifers. In the construction sector, water is used in large quantities throughout the different activities of the construction projects, this fact makes essential to quantify the water consumption in order to know the real demand for water, and thus to have a clear and precise vision about the volumes of this resource which are used in the different activities of a construction project. In this study, the water consumption coefficients in relation to the different items corresponding to the construction of 219 homes and 2 multipurpose rooms were determined. For this purpose, the theoretical results of water demand obtained by means of calculations of the project, were compared with the results obtained in the real consumption of water in-situ. Results obtained for theoretical and real consumption of the tasks showed that the theoretical water volume to be used in the work was 10,946 m3, this value differs with the real volume of 16,283 m3 of water used in the project, i.e., it was used an additional volume of 5,337 m3. The latter implies an increase of 48.8 % in water consumption, if compared to the theoretical water volume. The main water consuming activities were the following: soil compaction, irrigation to control particles in suspension, curing of concretes and mortars, worker camp, manufacture of concrete and mortars. Within these activities, the one that presented a higher than expected consumption was the irrigation for the control of suspended particles, whose theoretical value was 3,936,000 m3 and the real consumption was 6,010,000 m3, that is 53% higher than the provided. Considering the results obtained in this study, it is possible to estimate that in the construction sector there is higher water consumption, in comparison with the theoretical demand. In this sense, it is necessary to develop detailed studies based in the actual water consumption that guarantee the sustainability of this resource in arid zones.
DOI: 10.6084/m9.figshare.7244867.v1
title: Commercial flame retardants in four varieties of eucalyptus

description: ABSTRACT: The objective of this work was to verify the flame retardancy capacity of two commercial products applied in four forest species (Eucalyptus saligna, Eucalyptus dunnii, Corymbia maculata and Eucalyptus grandis) evaluating their loss of mass throughout the combustion process and the behavior of the when subjected to high temperatures. In this, 9 samples of each species were used. For the physical characterization of the species (apparent mass (g/cm3) and porosity (%)), 15 samples of each were prepared, totalizing 96 randomly selected test pieces (2.5 x 2.5 x 2.5cm). All were stabilized at 12% humidity in a heated room. Then, with the aid of a brush, three layers of the products tested on the samples were applied, and these were applied at 24 hour intervals. The dilution of the products obeyed the recommendations of their manufacturers. For the combustion of the samples, a Bunsen nozzle was used, where the samples were subjected to the flame of oxidation until the loss of 80% of its mass over time. During the combustion process, every 30 seconds, the mass loss occurred in the sample in this time interval. Thus, it was possible to obtain curves that allowed to analyze and to characterize the thermal resistance of the wood based on the loss of mass of the different species studied here. Both products proved to be effective as regards the retarding ability of mass loss of samples when at high temperatures, but the product based on nitrogen and borates is more efficient compared to the product based on synthetic resin pigmented with flame retardant additives (flame retardant paint). Regarding the effectiveness of these on the woods, the results vary according to the species studied and this possibly due to the chemical composition of each variety.
DOI: 10.6084/m9.figshare.7244870.v1
title: Influence of the use of accelerating admixture based on calcium nitrate in the performance of fly ash blended Portland cement mortars.

description: ABSTRACT Civil construction tends to require the optimization of processes with reduced times. Therefore, it is necessary to search for alternatives that provide the required properties to the concrete, in shorter periods of time. The objective of this work is to evaluate the influence of a calcium nitrate based accelerator admixture on the properties of Portland cement mortars with different fly ash (FA) contents, in order to analyze the effect in the incorporation of the admixture, mainly if the accelerator is able to compensate the low strength contribution of the FA at early ages. Tests were carried out using isothermal calorimetry, water absorption by capillarity, consistency index and compressive strength in mixtures with admixture contents of 0%, 0,33%, 0,66% and 1,00%. Regarding setting time results, as excepted the admixture accelerated the final setting time. By the other hand, in the samples with 40% and 60% of FA, an increase of the final setting time was verified. For the 1-day compressive strengths, the admixture content that have generated the highest values was 1.00% for mortars with 0% and 40% FA. At higher ages, the admixtures led to reduce the compressive strength values of the samples without FA. On the other hand, in the samples with 40% and 60% of FA with the use of the accelerator higher compressive strength were identified. It was verified that the mortars with admixture and without addition of FA showed a reduction in the absorption index by capillarity. For the samples with 40% and 60% of FA, the lower absorption index was obtained in the samples without admixture. Therefore, it is possible to conclude that the admixture evaluated in this research accelerated the hydration reactions, generating an increase in the compressive strength at early ages, but with an insufficient increase to compensate the lower reactivity of the FA. Taking into account the different properties evaluated, it was not possible to establish an optimum admixture content for each FA content. It is necessary to evaluate which property is of greater interest to the user.
DOI: 10.7284/135173
title: Anemometer data collected during research cruise SKQ201907T using a Gill WindObserver 75 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244861
title: Measurement estimation activities: The interpretation of Primary School teachers

description: Abstract This article presents the characterization of the mathematical and pedagogical knowledge regarding the measure estimation concept possessed by the Chilean primary school teachers based on the way they propose to utilize activities aimed to work on this concept. In the analysis, we use a definition of the measurement estimation concept constructed from the previous work of different authors. The methodology is of a descriptive and interpretative nature. The results shows weaknesses in the teachers knowledge about the measurement estimate and its use in the classroom, noting that some teachers confuse the measurement estimation activities indistinctly with the measurement activities or interpreting that they are those activities in which a random response can be given without justification, evidencing the need to include measurement estimation in teacher training.
DOI: 10.6084/m9.figshare.7244864.v1
title: Determination of drinking water consumption during the construction of houses in a semi-desert area of Chile

description: ABSTRACT In recent years, water scarcity in northern Chile has increased markedly, leading to an over exploitation of groundwater aquifers. In the construction sector, water is used in large quantities throughout the different activities of the construction projects, this fact makes essential to quantify the water consumption in order to know the real demand for water, and thus to have a clear and precise vision about the volumes of this resource which are used in the different activities of a construction project. In this study, the water consumption coefficients in relation to the different items corresponding to the construction of 219 homes and 2 multipurpose rooms were determined. For this purpose, the theoretical results of water demand obtained by means of calculations of the project, were compared with the results obtained in the real consumption of water in-situ. Results obtained for theoretical and real consumption of the tasks showed that the theoretical water volume to be used in the work was 10,946 m3, this value differs with the real volume of 16,283 m3 of water used in the project, i.e., it was used an additional volume of 5,337 m3. The latter implies an increase of 48.8 % in water consumption, if compared to the theoretical water volume. The main water consuming activities were the following: soil compaction, irrigation to control particles in suspension, curing of concretes and mortars, worker camp, manufacture of concrete and mortars. Within these activities, the one that presented a higher than expected consumption was the irrigation for the control of suspended particles, whose theoretical value was 3,936,000 m3 and the real consumption was 6,010,000 m3, that is 53% higher than the provided. Considering the results obtained in this study, it is possible to estimate that in the construction sector there is higher water consumption, in comparison with the theoretical demand. In this sense, it is necessary to develop detailed studies based in the actual water consumption that guarantee the sustainability of this resource in arid zones.
DOI: 10.6084/m9.figshare.7244855
title: Case study of analysis of interferences between the discipline of a building with conventional designs (re) modeling in BIM

description: ABSTRACT Building Information Modeling (BIM) provides for the creation of a digital parametric model. The database created enables the extraction of concise information at all stages of the development of the enterprise. This concept goes beyond three-dimensional modeling and aggregates concepts of team integration, interference analysis, compatibilization and multi-dimensionality to the designing act. The objective of this article is to demonstrate, using a case study, the use of the BIM platform for the modeling and analysis of the interferences of the projects architectural, structural and hydrosanitary. For this, a three-dimensional modeling was done from projects, in 2D and digital boards, that were made available by the engineers responsible for the project, after its construction. The architectural design was first modeled in Revit®, followed by the hydrosanitary and finally the structural one. The three-dimensional models were then confronted in Navisworks®. As a result, it was possible, through the creation of the digital model, to quantify the existing interpositions at the structural/hydrosanitary interface. In this way, after the execution of the analysis, it was possible to verify which interferences could have been solved already in the design phase, thus avoiding eventual problems in the execution. The interoperability of software provided by the BIM platform and the extraction of information from the database generated by the modeling were verified in practice. This concludes the possible benefit of applying it both at the project stage and at the time of implementation.
DOI: 10.6084/m9.figshare.7244858
title: Soil column test to study the influence of dimension stone fine wastes on water quality

description: ABSTRACT The generation of fine wastes from cutting of ornamental stones grows at the same rate of plate production for civil construction. The adoption of safe, remediating and punitive measures are linked to the knowledge of the actual potentiality that these materials have for causing negative impacts to the environment. The aim of this work was to simulate, in laboratory, possible alterations in the recharging groundwater quality provoked by the improper disposal of these wastes. We conducted tests of percolating water through soil columns covered by wastes with different humidity rates: wastes without treatment, outgoing directly from the looms (TE); wastes that passed by filter press for humidity reducing (FP) and wastes dried in a drying pond (LS). Percolated water was analyzed to evaluate alterations of its quality in relation to a blank (B) or control. Significant changes did not occur in pH-values of percolated water in any of the cases studied. However, many water quality parameters were changed during TE treatment. The water percolated through FP residues was similar to that of the looms in relation to some parameters and with the LS wastes, in others. We concluded that the wastes that just left the loom have high potential for changing water quality, but the reduction of waste´s humidity is efficient for minimizing environmental risks. The use of drying bed could be as efficient as the filter press, if conducted in a proper form and according to legal regulations.
DOI: 10.6084/m9.figshare.7244861.v1
title: Measurement estimation activities: The interpretation of Primary School teachers

description: Abstract This article presents the characterization of the mathematical and pedagogical knowledge regarding the measure estimation concept possessed by the Chilean primary school teachers based on the way they propose to utilize activities aimed to work on this concept. In the analysis, we use a definition of the measurement estimation concept constructed from the previous work of different authors. The methodology is of a descriptive and interpretative nature. The results shows weaknesses in the teachers knowledge about the measurement estimate and its use in the classroom, noting that some teachers confuse the measurement estimation activities indistinctly with the measurement activities or interpreting that they are those activities in which a random response can be given without justification, evidencing the need to include measurement estimation in teacher training.
DOI: 10.6084/m9.figshare.7244855.v1
title: Case study of analysis of interferences between the discipline of a building with conventional designs (re) modeling in BIM

description: ABSTRACT Building Information Modeling (BIM) provides for the creation of a digital parametric model. The database created enables the extraction of concise information at all stages of the development of the enterprise. This concept goes beyond three-dimensional modeling and aggregates concepts of team integration, interference analysis, compatibilization and multi-dimensionality to the designing act. The objective of this article is to demonstrate, using a case study, the use of the BIM platform for the modeling and analysis of the interferences of the projects architectural, structural and hydrosanitary. For this, a three-dimensional modeling was done from projects, in 2D and digital boards, that were made available by the engineers responsible for the project, after its construction. The architectural design was first modeled in Revit®, followed by the hydrosanitary and finally the structural one. The three-dimensional models were then confronted in Navisworks®. As a result, it was possible, through the creation of the digital model, to quantify the existing interpositions at the structural/hydrosanitary interface. In this way, after the execution of the analysis, it was possible to verify which interferences could have been solved already in the design phase, thus avoiding eventual problems in the execution. The interoperability of software provided by the BIM platform and the extraction of information from the database generated by the modeling were verified in practice. This concludes the possible benefit of applying it both at the project stage and at the time of implementation.
DOI: 10.7284/135174
title: Anemometer data collected during research cruise SKQ201907T using a Gill WindObserver 75 instrument system onboard the platform RV Sikuliaq

description: Processed data created by vessel technician during a Field_expedition
DOI: 10.6084/m9.figshare.7244852
title: RECENT ADVANCES IN ORGANIC REACTIONS CATALYZED BY NICKEL

description: Nickel complexes have been widely used as catalysts in organic reactions. Their low price compared to Pd and Pt complexes, in addition to their high reactivity and affinity to ϖ systems; the possibility to access different oxidation states and the difficulty to undergo beta-hydride elimination are important features that have attracted the attention of chemists in recent decades. Furthermore, some drawbacks observed with Pd catalysis have been solved by Ni catalysis. These Ni based-catalysts have been used in different reaction manifolds to promote challenging transformations. Herein, recent work using nickel catalysts in different types of reactions, such as carbonylations, carboxylations, C-H activations and dual catalytic systems are described. Critical mechanistic investigations, as well as synthetic applications are also covered.
DOI: 10.6084/m9.figshare.7244858.v1
title: Soil column test to study the influence of dimension stone fine wastes on water quality

description: ABSTRACT The generation of fine wastes from cutting of ornamental stones grows at the same rate of plate production for civil construction. The adoption of safe, remediating and punitive measures are linked to the knowledge of the actual potentiality that these materials have for causing negative impacts to the environment. The aim of this work was to simulate, in laboratory, possible alterations in the recharging groundwater quality provoked by the improper disposal of these wastes. We conducted tests of percolating water through soil columns covered by wastes with different humidity rates: wastes without treatment, outgoing directly from the looms (TE); wastes that passed by filter press for humidity reducing (FP) and wastes dried in a drying pond (LS). Percolated water was analyzed to evaluate alterations of its quality in relation to a blank (B) or control. Significant changes did not occur in pH-values of percolated water in any of the cases studied. However, many water quality parameters were changed during TE treatment. The water percolated through FP residues was similar to that of the looms in relation to some parameters and with the LS wastes, in others. We concluded that the wastes that just left the loom have high potential for changing water quality, but the reduction of waste´s humidity is efficient for minimizing environmental risks. The use of drying bed could be as efficient as the filter press, if conducted in a proper form and according to legal regulations.
DOI: 10.7284/135162
title: Expendable Probe data collected during research cruise SKQ201907T using a Sippican MK21 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244849
title: Chronic migraine patients show cognitive impairment in an extended neuropsychological assessment

description: ABSTRACT The objective of the present study was to assess the presence of cognitive deficits in patients with chronic migraine, and to assess the main factors that trigger cognitive disorders, such as comorbidities or the use of medications. Methods: Chronic migraine and control groups were interviewed in a case-control study. The frequency and intensity of the headache, medication used and associated comorbidities were determined. All patients were submitted to an extended neuropsychological assessment. Results: The chronic migraine group (n = 30) had a worse performance in the Montreal Cognitive Assessment Test (p = 0.00), Verbal Fluency (p = 0.00), Stroop (p = 0.00), Clock Drawing Test (p = 0.00), Digit Span (p = 0.00) and Matrix Reasoning (p = 0.01). After statistical adjustment by linear regression, migraine continued to be the only relevant factor in the poorer performance in the Montreal Cognitive Assessment, Verbal Fluency, Clock Drawing and Stroop tests. Conclusion: Patients with chronic migraine have cognitive deficits in multiple tasks, regardless of the presence of comorbidities or the use of medications.
DOI: 10.6084/m9.figshare.7244852.v1
title: RECENT ADVANCES IN ORGANIC REACTIONS CATALYZED BY NICKEL

description: Nickel complexes have been widely used as catalysts in organic reactions. Their low price compared to Pd and Pt complexes, in addition to their high reactivity and affinity to ϖ systems; the possibility to access different oxidation states and the difficulty to undergo beta-hydride elimination are important features that have attracted the attention of chemists in recent decades. Furthermore, some drawbacks observed with Pd catalysis have been solved by Ni catalysis. These Ni based-catalysts have been used in different reaction manifolds to promote challenging transformations. Herein, recent work using nickel catalysts in different types of reactions, such as carbonylations, carboxylations, C-H activations and dual catalytic systems are described. Critical mechanistic investigations, as well as synthetic applications are also covered.
DOI: 10.6084/m9.figshare.7244846
title: Spatial Distribution of Temporal Metadata and Spatial Metadata Quality of Santa Catarina State Weather Stations for Climatology

description: Abstract The objective of this paper was to evaluate the temporal (start date and end date) and spatial metadata (latitude, longitude and altitude) of the Santa Catarina state weather stations, based on the recommendations of the World Meteorological Organization - WMO for climate studies. Metadata of the weather stations maintained by the Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri until 06/30/2017 were evaluated. The Santa Catarina state has few weather stations with historical series above the minimum period of 30 years, indicated by WMO to carry out climatic studies. The spatial distribution of weather stations are not in accordance with the pattern of territorial representation established by WMO. Despite advances in the weather stations network management process, the state of Santa Catarina needs to comply with all recommendations of WMO, to ensure the quality of the temporal and spatial metadata of climate monitoring stations.
DOI: 10.6084/m9.figshare.7244849.v1
title: Chronic migraine patients show cognitive impairment in an extended neuropsychological assessment

description: ABSTRACT The objective of the present study was to assess the presence of cognitive deficits in patients with chronic migraine, and to assess the main factors that trigger cognitive disorders, such as comorbidities or the use of medications. Methods: Chronic migraine and control groups were interviewed in a case-control study. The frequency and intensity of the headache, medication used and associated comorbidities were determined. All patients were submitted to an extended neuropsychological assessment. Results: The chronic migraine group (n = 30) had a worse performance in the Montreal Cognitive Assessment Test (p = 0.00), Verbal Fluency (p = 0.00), Stroop (p = 0.00), Clock Drawing Test (p = 0.00), Digit Span (p = 0.00) and Matrix Reasoning (p = 0.01). After statistical adjustment by linear regression, migraine continued to be the only relevant factor in the poorer performance in the Montreal Cognitive Assessment, Verbal Fluency, Clock Drawing and Stroop tests. Conclusion: Patients with chronic migraine have cognitive deficits in multiple tasks, regardless of the presence of comorbidities or the use of medications.
DOI: 10.7284/135164
title: Flowmeter data collected during research cruise SKQ201907T using a Krohne Optiflux 5000 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition