cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7244228.v1
title: ASSOCIATION BETWEEN PERCEPTION OF SLEEP QUALITY AND ASSIMILATION OF CONTENT COVERED IN CLASS

description: ABSTRACT Objective: To analyze the association between self-perception of sleep quality and assimilation of content covered in classes by adolescents. Methods: Epidemiological cross-sectional study conducted with 481 high-school students (14 to 19 years), both genders, enrolled in public schools in the city of Caruaru, Pernambuco, and selected by random cluster sampling strategy. Analyses were conducted using the Chi-square test and binary logistic regression. Results: 44.1% of the adolescents reported learning difficulties during classes, 77.1% slept less than eight hours per day, and 28.9% had a bad perception of their sleep quality. Young people who studied at least one extra hour per day out of school had less difficulty in assimilating class content (OR=0.34; 95%CI 0.19-0.58). We also found that participants who reported a bad perception of sleep quality were more likely to have learning difficulties at school (OR=1.73; 95%CI 1.13-2.65) regardless of gender, age, school shift, study time out of school, and sleeping hours. Conclusions: Perception of sleep quality was associated with learning difficulties at school regardless of the number of sleeping and study hours.
DOI: 10.7284/135129
title: Radiometer data collected during research cruise SKQ201912S using a Biospherical QSR-2150 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244216
title: Cardiovascular Risk Estimation by the ASCVD Risk Estimator Application in a University Hospital

description: Abstract Background: Cardiovascular diseases (CVDs) are responsible for many deaths in Brazil and in the world, especially in the economically active population. Risk factors for these diseases include comorbidities such as high blood pressure (HBP), diabetes mellitus (DM) and dyslipidemia. Innovation of portable technology combined with the high prevalence of CVDs motivated the development of the ASCVD Risk Estimator by the American Heart Association/American College of Cardiology. Objectives: Estimate the cardiovascular risk of patients hospitalized in the internal medicine wards of Gaffrée e Guinle University Hospital (HUGG) using the ASCVD Risk Estimator, and describe the main risk factors in this population. Methods: A prospective, cross-sectional study was conducted, the following data were collected from the medical records: sex, age, ethnicity, presence of HBP, DM, systolic arterial pressure, smoking habits, total cholesterol and HDL levels. Statistical analysis was performed by the chi-square test, with calculation of p-value, relative risk and confidence interval in the correlations. Results: A total of 339 medical records were reviewed, and 72 (21.2%) fulfilled the inclusion and exclusion criteria. Twenty-three (32%) patients were classified as at high cardiovascular risk by the application. The main risk factors in the high risk group were age greater than or equal to 60 years (n = 21; 91.30%), dyslipidemia (n = 15; 65,2%), high blood pressure (n = 15; 65.2%), male sex (n = 13; n = 56.5%) and smoking (n = 11; 47.8%). Conclusion: Approximately one third of the study population had a high cardiovascular risk; HBP and dyslipidemia were the most prevalent modifiable risk factor in the high risk group. We may say that there is no single protocol or score available able to estimate the cardiovascular risk of all individuals in the same way, and therefore, the physician must individually evaluate the patients and be updated on the best methods of disease prevention to improve current approaches.
DOI: 10.6084/m9.figshare.7244222.v1
title: Influence of physical-chemical parameters on the composition of toxic constituents in landfill leachate

description: ABSTRACT The characterization of leachate generated in landfills can clarify the degradation phenomena that occur inside the waste cells and indirectly indicate their toxic potential. The objective of this study was to evaluate the influence of physical and chemical parameters on toxic components, such as metals and total ammonia nitrogen (TAN), found in the leachate generated by a cell from the Sanitary Landfill in Campina Grande, Paraíba. pH, volatile fatty acids (VFA), total alkalinity (AT), chlorides, chemical oxygen demand (COD), TAN and metals (Pb, Cr, Co, Ni, Fe and Mn) were investigated. The results showed that during the acid fermentation phase a high production of VFA occurred in the landfilled waste mass, which maintained the values of pH below neutrality and contributed for high concentrations of COD, chlorides and a higher toxicity in the leachate compared with the analyzed metals. However, in the case of methanogenic conditions, a decrease in the VFA contents was observed and, with this, the pH tended to be basicity, making the medium more alkaline, favoring the precipitation of the studied metals, but contributing to the high levels of TAN. It is possible to conclude that pH and VFA had a strong influence on the metals (Pb, Cr, Co, Ni, Fe and Mn) and TAN during the 150 days of evaluation.
DOI: 10.7284/135130
title: Singlebeam Echosounder data collected during research cruise SKQ201912S using a Kongsberg TOPAS PS-18 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244213
title: Adaptability of lettuce cultivars to planting in no-tillage on straw of Urochloa ruziziensis

description: Abstract: The objective of this work was to evaluate the adaptability of different lettuce (Lactuca sativa) cultivars grown in no-tillage on straw of ruzi grass (Urochloa ruziziensis), as well as its effects on soil temperature and weed control, in successive cultivations in the summer. The treatments were carried out in a randomized complete block design, with four replicates, in a split-plot arrangement (2x4), in which soil management (no-tillage on ruzi grass and convention tillage) was the main plot, and the different crisphead lettuce cultivars (Amanda, Solaris, Vanda, and Vera), the subplots. No difference was observed between cultivars for soil management. No-tillage reduced the soil temperature by up to 3.7°C and weed density by 3.7 times, in comparison with conventional tillage. Ruzi grass promoted a greater bed conservation. In comparison to with conventional tillage, the no-tillage management of lettuce cultivated on ruzi grass straw resulted in a lower yield in the first crop due to excess straw; in a similar yield in the second crop; and in a greater yield in the third crop. Lettuce cultivated on ruzi grass straw in no-tillage management results in a greater sustainability, in comparison with conventional tillage, in three successive plantings.
DOI: 10.6084/m9.figshare.7244213.v1
title: Adaptability of lettuce cultivars to planting in no-tillage on straw of Urochloa ruziziensis

description: Abstract: The objective of this work was to evaluate the adaptability of different lettuce (Lactuca sativa) cultivars grown in no-tillage on straw of ruzi grass (Urochloa ruziziensis), as well as its effects on soil temperature and weed control, in successive cultivations in the summer. The treatments were carried out in a randomized complete block design, with four replicates, in a split-plot arrangement (2x4), in which soil management (no-tillage on ruzi grass and convention tillage) was the main plot, and the different crisphead lettuce cultivars (Amanda, Solaris, Vanda, and Vera), the subplots. No difference was observed between cultivars for soil management. No-tillage reduced the soil temperature by up to 3.7°C and weed density by 3.7 times, in comparison with conventional tillage. Ruzi grass promoted a greater bed conservation. In comparison to with conventional tillage, the no-tillage management of lettuce cultivated on ruzi grass straw resulted in a lower yield in the first crop due to excess straw; in a similar yield in the second crop; and in a greater yield in the third crop. Lettuce cultivated on ruzi grass straw in no-tillage management results in a greater sustainability, in comparison with conventional tillage, in three successive plantings.
DOI: 10.6084/m9.figshare.7244216.v1
title: Cardiovascular Risk Estimation by the ASCVD Risk Estimator Application in a University Hospital

description: Abstract Background: Cardiovascular diseases (CVDs) are responsible for many deaths in Brazil and in the world, especially in the economically active population. Risk factors for these diseases include comorbidities such as high blood pressure (HBP), diabetes mellitus (DM) and dyslipidemia. Innovation of portable technology combined with the high prevalence of CVDs motivated the development of the ASCVD Risk Estimator by the American Heart Association/American College of Cardiology. Objectives: Estimate the cardiovascular risk of patients hospitalized in the internal medicine wards of Gaffrée e Guinle University Hospital (HUGG) using the ASCVD Risk Estimator, and describe the main risk factors in this population. Methods: A prospective, cross-sectional study was conducted, the following data were collected from the medical records: sex, age, ethnicity, presence of HBP, DM, systolic arterial pressure, smoking habits, total cholesterol and HDL levels. Statistical analysis was performed by the chi-square test, with calculation of p-value, relative risk and confidence interval in the correlations. Results: A total of 339 medical records were reviewed, and 72 (21.2%) fulfilled the inclusion and exclusion criteria. Twenty-three (32%) patients were classified as at high cardiovascular risk by the application. The main risk factors in the high risk group were age greater than or equal to 60 years (n = 21; 91.30%), dyslipidemia (n = 15; 65,2%), high blood pressure (n = 15; 65.2%), male sex (n = 13; n = 56.5%) and smoking (n = 11; 47.8%). Conclusion: Approximately one third of the study population had a high cardiovascular risk; HBP and dyslipidemia were the most prevalent modifiable risk factor in the high risk group. We may say that there is no single protocol or score available able to estimate the cardiovascular risk of all individuals in the same way, and therefore, the physician must individually evaluate the patients and be updated on the best methods of disease prevention to improve current approaches.
DOI: 10.6084/m9.figshare.7244210
title: First phytochemical and biological study of the ethanolic extract from leaves of Capirona decorticans (Rubiaceae)

description: ABSTRACT Capirona decorticans (Rubiaceae) is popularly used to treat warts, wounds, mycoses and scabies, and is also a component of the Ayahuasca tea. Despite its popular use, the phytochemical and pharmacological research on this species is limited. Therefore, this work quantified phenolic compounds in the ethanolic extract (EE) and hydromethanolic fraction (FM) (406, 293 mgEAG g-1, respectively) from leaves of C. decorticans. We identified flavonoids by LC-MS/MS-MMR-ESI (apigenin, rutin, luteolin, miricetin, quercetin, quercetin-3-β-D-glucoside, quercetrin), and evaluated oxidative stress and mutagenic/antimutagenic effect of EE and FM through an in vivo experiment using Swiss mice and cyclophosphamide (CP) as an inducer of DNA damage and oxidative stress. Mice were pretreated for 15 consecutive days with EE or FM (250 mg kg-1) and then intraperitoneally injected with CP (25 mg kg-1). Carbonylated proteins, ascorbic acid, catalase and thiobarbituric acid-reactive substances were measured in hepatic and renal tissues. The mutagenic/antimutagenic effect was evaluated through the Micronucleus Test. Protein carbonylation in the liver of animals exposed to CP was reduced by FM. There was no significant effect on other markers of oxidative stress. The groups treated with the extracts showed a significant percentage reduction (EE = 96% and FM = 71%) in the frequency of micronucleated polychromatic erythrocytes induced by CP. EE showed mutagenicity when used alone. The EE and FM of C. decorticans leaves showed antioxidant potential equivalent to that observed in other species, did not cause oxidative stress, nor toxicity, and had a protective and antimutagenic effect, although the EE showed signs of mutagenicity.
DOI: 10.6084/m9.figshare.7244210.v1
title: First phytochemical and biological study of the ethanolic extract from leaves of Capirona decorticans (Rubiaceae)

description: ABSTRACT Capirona decorticans (Rubiaceae) is popularly used to treat warts, wounds, mycoses and scabies, and is also a component of the Ayahuasca tea. Despite its popular use, the phytochemical and pharmacological research on this species is limited. Therefore, this work quantified phenolic compounds in the ethanolic extract (EE) and hydromethanolic fraction (FM) (406, 293 mgEAG g-1, respectively) from leaves of C. decorticans. We identified flavonoids by LC-MS/MS-MMR-ESI (apigenin, rutin, luteolin, miricetin, quercetin, quercetin-3-β-D-glucoside, quercetrin), and evaluated oxidative stress and mutagenic/antimutagenic effect of EE and FM through an in vivo experiment using Swiss mice and cyclophosphamide (CP) as an inducer of DNA damage and oxidative stress. Mice were pretreated for 15 consecutive days with EE or FM (250 mg kg-1) and then intraperitoneally injected with CP (25 mg kg-1). Carbonylated proteins, ascorbic acid, catalase and thiobarbituric acid-reactive substances were measured in hepatic and renal tissues. The mutagenic/antimutagenic effect was evaluated through the Micronucleus Test. Protein carbonylation in the liver of animals exposed to CP was reduced by FM. There was no significant effect on other markers of oxidative stress. The groups treated with the extracts showed a significant percentage reduction (EE = 96% and FM = 71%) in the frequency of micronucleated polychromatic erythrocytes induced by CP. EE showed mutagenicity when used alone. The EE and FM of C. decorticans leaves showed antioxidant potential equivalent to that observed in other species, did not cause oxidative stress, nor toxicity, and had a protective and antimutagenic effect, although the EE showed signs of mutagenicity.
DOI: 10.7284/135131
title: Singlebeam Echosounder data collected during research cruise SKQ201912S using a L-3 ELAC LAZ 5100 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244204
title: Fresh properties of HPSCC containing SRA and expansive admixtures

description: ABSTRACT Shrinkage-reducing admixture (SRA) and expansive admixture (EXA) were used in high performance self-compacting concrete (HPSCC) to mitigate autogenous shrinkage. In order to evaluate the fresh properties of concretes, the rheological parameters were determined in a ICAR rheometer at 10, 25, 40, 60 and 90 min. The flow behavior of the mixtures was described by Bingham, Herschel-Bulkley, and modified Bingham models. Slump flow test, V-funnel test and J-Ring test were also carried out at 10 min. Slump flow test was performed also after 90 min of mixing. The test results showed that, at 10 minutes, all mixtures had similar performances, independently of the SRA and EXA contents. However, the slump flow test shows a reduction of up to 24% of its diameter at 90 min for mixtures with EXA. Mixtures with EXA revealed a gradual increase in dynamic yield stress with elapsed time. In contrast, concretes with SRA exhibited less variation in its rheological properties. Statistical analysis (ANOVA) showed that, regardless of the rheological model adopted, the admixture content was not a significant factor for the yield stress, while the type of admixture and the time of testing greatly influenced the concretes rheological response.
DOI: 10.6084/m9.figshare.7244207
title: Understanding the Two-Dimensional Representation of Polycubes by Sixth Grade Students in External Assessment Tasks

description: Abstract In school mathematics, tasks are determinant in learning. The tasks of the national external assessment tests, when proposed to the students, also contribute to influence the teaching-learning process. This study, which presents partial data of an ongoing research, has the objective of analyzing geometry tasks involving bidimensional construction representations with polycubes taken from external evaluation tests. More specifically, they analyze the mental processes to which they appeal, those used by the students in their resolution, as well as the difficulties experienced in this process. We will take as a work base, the results of some researches that describe several difficulties observed when the students interpret flat construction representations with polycubes. The study follows an interpretative methodology, with a documental collection of the evidence of the resolutions produced by the students and of their testimonies recorded in video during interviews. With this work, in general terms, we reveal important flaws in the knowledge involved in the visualization of constructions with polycubes represented bidimensional. The results evidenced the simultaneous need for visualization capabilities, spatial structuring and organized strategies of counting cubes in a construction with polycubes.
DOI: 10.6084/m9.figshare.7244201
title: Experimental analysis of post-installed corbels with adhesive anchors

description: ABSTRACT The greater difficulty in the use of precast structures is related to the connections, which can be complex and costly depending on the design, opposing one of the main advantages of this constructive system, the speed. Then, the search for simpler and more economical solutions corresponds to one of the most important principles of the project. Thus, one of the alternatives to be considered during the project to improve the simplicity in the column production is to avoid holes and cuts in the formwork. The main aim of this paper is to study the alternative of using chemical adhesive for fastening the corbel reinforcement after casting the column. It was developed an experimental program with 3 tests full scale specimens with equal dimensions short corbels. Were tested 2 post-installed corbels with the main tie reinforcement fastened with adhesive anchor and 1 cast in corbel with the main tie reinforcement anchored with hooked 90 º bars. The cast in corbel (specimen A) was designed according to the recommendations of the standards NBR6118:2014 e NBR9062:2006, 1 post-installed corbel (specimen B) was designed with the same anchorage length of the cast in corbel and the other post-installed corbel was designed according to the recommendations of the chemical adhesive producer. This way, was possible evaluate by comparing the models that the anchorage length did not influence the corbel behavior during the test. The specimen A presented the ultimate load of 400 kN, specimen B 340 kN and specimen C 377 kN was possible evaluate the influence of the anchorage length in the corbel behavior and the safety of the solution comparing with a cast in corbel. All of the specimens presented failure by flexure-tension in a ductile manner and ultimate loads higher than foreseen by standards and calculation models. The post-installed corbels presented a satisfactory mechanical behavior and can be considered as a viable alternative.
DOI: 10.6084/m9.figshare.7244204.v1
title: Fresh properties of HPSCC containing SRA and expansive admixtures

description: ABSTRACT Shrinkage-reducing admixture (SRA) and expansive admixture (EXA) were used in high performance self-compacting concrete (HPSCC) to mitigate autogenous shrinkage. In order to evaluate the fresh properties of concretes, the rheological parameters were determined in a ICAR rheometer at 10, 25, 40, 60 and 90 min. The flow behavior of the mixtures was described by Bingham, Herschel-Bulkley, and modified Bingham models. Slump flow test, V-funnel test and J-Ring test were also carried out at 10 min. Slump flow test was performed also after 90 min of mixing. The test results showed that, at 10 minutes, all mixtures had similar performances, independently of the SRA and EXA contents. However, the slump flow test shows a reduction of up to 24% of its diameter at 90 min for mixtures with EXA. Mixtures with EXA revealed a gradual increase in dynamic yield stress with elapsed time. In contrast, concretes with SRA exhibited less variation in its rheological properties. Statistical analysis (ANOVA) showed that, regardless of the rheological model adopted, the admixture content was not a significant factor for the yield stress, while the type of admixture and the time of testing greatly influenced the concretes rheological response.
DOI: 10.6084/m9.figshare.7244207.v1
title: Understanding the Two-Dimensional Representation of Polycubes by Sixth Grade Students in External Assessment Tasks

description: Abstract In school mathematics, tasks are determinant in learning. The tasks of the national external assessment tests, when proposed to the students, also contribute to influence the teaching-learning process. This study, which presents partial data of an ongoing research, has the objective of analyzing geometry tasks involving bidimensional construction representations with polycubes taken from external evaluation tests. More specifically, they analyze the mental processes to which they appeal, those used by the students in their resolution, as well as the difficulties experienced in this process. We will take as a work base, the results of some researches that describe several difficulties observed when the students interpret flat construction representations with polycubes. The study follows an interpretative methodology, with a documental collection of the evidence of the resolutions produced by the students and of their testimonies recorded in video during interviews. With this work, in general terms, we reveal important flaws in the knowledge involved in the visualization of constructions with polycubes represented bidimensional. The results evidenced the simultaneous need for visualization capabilities, spatial structuring and organized strategies of counting cubes in a construction with polycubes.
DOI: 10.6084/m9.figshare.7244198
title: Influence of different compacting methods on concrete compressive strength

description: ABSTRACT Adequate compacting is an important stage contributing for the durability and final quality of concrete structures. The two main ways of compacting concrete are: manual and mechanical (immersion vibrator). This paper has the goal of verifying the influence of those two compacting methods on the compressive strength of concrete from long term data. In order to do that, cylindrical test specimens of a same concrete were molded with different compacting methods and the compressive strength was investigated at 1, 3 , 7, 14, 21, 28, 63, 91, 180, 365 and 730 days. Concrete used was casted in plant. Manual compacting was performed using a metallic and cylindrical rod. Mechanical compacting was performed using a rigid immersion vibrator driven by an electric motor. This study confirmed greater compressive strength in test specimens compacted with immersion vibrator, when compared with results in manually compacted test specimens. However, the novelty of this article is that variance analysis test demonstrated that only from 63 days the difference between compressive strengths is significant. Long term data also made it possible to generate a trend equation with good coefficient of determination for estimating the difference between compressive strengths for the two compacting methods investigated over time.
DOI: 10.7284/135135
title: Water Temperature data collected during research cruise SKQ201912S using a HEITRONICS CT15.10 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition