cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7244471.v1
title: Temporomandibular disorder: otologic implications and its relationship to sleep bruxism

description: Abstract Introduction: Temporomandibular disorder is an umbrella term for various clinical problems affecting the muscles of mastication, temporomandibular joint and associated structures. This disorder has a multifactor etiology, with oral parafunctional habits considered an important co-factor. Among such habits, sleep bruxism is considered a causal agent involved in the initiation and/or perpetuation of temporomandibular disorder. That condition can result in pain otologic symptoms. Objective: The aim of the present study was to investigate the relationship between temporomandibular disorder and both otologic symptoms and bruxism. Methods: A total of 776 individuals aged 15 years or older from urban areas in the city of Recife (Brazil) registered at Family Health Units were examined. The diagnosis of temporomandibular disorder was determined using Axis I of the Research Diagnostic Criteria for temporomandibular disorders, addressing questions concerning myofascial pain and joint problems (disk displacement, arthralgia, osteoarthritis and osteoarthrosis). Four examiners had previously undergone training and calibration exercises for the administration of the instrument. Intra-examiner and inter-examiner agreement was determined using the Kappa statistic. Individuals with a diagnosis of at least one of these conditions were classified as having temporomandibular disorder. The diagnosis of otologic symptoms and bruxism was defined using the same instrument and a clinical exam. Results: Among the individuals with temporomandibular disorder, 58.2% had at least one otologic symptom and 52% exhibited bruxism. Statistically significant associations were found between the disorder and both otologic symptoms and bruxism (p &lt; 0.01 for both conditions; OR = 2.12 and 2.3 respectively). Otologic symptoms and bruxism maintained statistical significance in the binary logistic regression analysis, which demonstrated a 1.7 fold and twofold greater chance of such individuals have temporomandibular disorder, respectively. Conclusion: The logistic regression analysis demonstrated strong associations between the disorder and both otologic symptoms and bruxism when analyzed simultaneously, independently of patient age and gender.
DOI: 10.7284/135072
title: ADCP (Acoustic Doppler Current Profiler) data collected during research cruise SKQ201911T using a Hawaii UHDAS instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7244465
title: Water quality index modified by using multivariate analysis: a case study of Pelotas Stream, RS, Brazil

description: ABSTRACT This research aimed at developing a modified water quality index (WQIMod) by using multivariate analysis, from a comparison with the WQI used by the Environmental Company of São Paulo (Companhia Ambiental do Estado de São Paulo-Cetesb) (IQACETESB), to be applied in the Pelotas Stream, RS, Brazil. Secondary data from Pelotas Stream surface water quality were used, collected in the sampling site GER 48, located in the municipality of Pelotas, where they were monitored and provided by the State Foundation of Environmental Protection Henrique Luís Roessler (Fundação Estadual de Proteção Ambiental Henrique Luís Roessler-FEPAM) between 1997 and 2013. Among the multivariate analyses, the factor analysis/principal component analysis (PCA) was used. The results indicated that the PCA extracted two principal components, which explained 100% of the total data variance in the correlation matrix, while the factorial scores for WQIMod calculation were extracted from the first factor, which explained 70.6% of the total data variance. We concluded that the WQIMod exhibits biochemical oxygen demand (BOD5), turbidity (TH) and total solids (TS) as the most important variables for the index construction, differing from the WQICETESB, which shows the variables dissolved oxygen (DO), thermotolerant coliforms (TC) and hydrogenionic potential (pH) as the most relevant ones, indicating the need of WQICETESB calibration for applying in this specific ecosystem.
DOI: 10.6084/m9.figshare.7244468.v1
title: Urease activity according to the different inhibitors

description: Abstract The objective of this study was to evaluate NBPT, zeolite and humic acid in different concentrations as inhibitors of the activity of the enzyme urease. The activity of the urease enzyme was quantified by the methods proposed by May and Douglas (1976) and Witte and Medina-Escobar (2001). For this reason, two experiments were conducted in a completely randomized design in split plots, in which the incubation periods are the plots and the fertilizers with the inhibitors at the different concentrations are the subplots with three replications. Fifteen fertilizers based on NBPT-coated urea, humic acid and zeolite were used in different concentrations. The two methods of analysis used in the experiment confirmed the efficiency of NBPT in inhibiting the enzymatic action even at low concentration, with 0.02% (m/m) being sufficient to inhibit urease, with no difference between inhibitor concentrations. The addition of humic acid reduced the activity of urease after 36 hours of reaction when the activity of the enzyme was evaluated by the method proposed by May and Douglas (1976). Zeolite did not influence the activity of the urease enzyme when analyzed by the May and Douglas method (1976).
DOI: 10.6084/m9.figshare.7244462
title: Concrete beams repaired with geopolymer mortar

description: ABSTRACT This work evaluated the effectiveness of a geopolymer mortar as a material for the repair of conventional concrete beams, objectifying to restore the monolithic character and the initial load bearing capacity of the repaired structure. For this, rehabilitated concrete beams with geopolymer mortar and commercial repair mortar were analyzed and compared with reference beams without repair, by means of tests of tensile strength in the flexion and of strengh of flexural shear adhesion. The results show that the greatest deflections occurred for the specimens recovered with geopolymer mortar (when compared to the reference beams of monolithic concrete) without, however, a considerable increase in the rupture load, justified by the low longitudinal modulus of elasticity of the repair material. The beams recovered with geopolymer mortar presented a very similar rupture behavior to the reference beams, that is, they behaved monolithically, unlike those recovered with commercial mortar, which showed substrate/repair interface displacement. The results indicate that the geopolymeric mortar has potential to be used as an alternative material for repairing conventional concrete beams due mainly to the satisfactory adhesion to concrete of the substrate, to the bursting load close to that of the reference monolith beam and to the best quality in relation to commercial mortar.
DOI: 10.6084/m9.figshare.7244462.v1
title: Concrete beams repaired with geopolymer mortar

description: ABSTRACT This work evaluated the effectiveness of a geopolymer mortar as a material for the repair of conventional concrete beams, objectifying to restore the monolithic character and the initial load bearing capacity of the repaired structure. For this, rehabilitated concrete beams with geopolymer mortar and commercial repair mortar were analyzed and compared with reference beams without repair, by means of tests of tensile strength in the flexion and of strengh of flexural shear adhesion. The results show that the greatest deflections occurred for the specimens recovered with geopolymer mortar (when compared to the reference beams of monolithic concrete) without, however, a considerable increase in the rupture load, justified by the low longitudinal modulus of elasticity of the repair material. The beams recovered with geopolymer mortar presented a very similar rupture behavior to the reference beams, that is, they behaved monolithically, unlike those recovered with commercial mortar, which showed substrate/repair interface displacement. The results indicate that the geopolymeric mortar has potential to be used as an alternative material for repairing conventional concrete beams due mainly to the satisfactory adhesion to concrete of the substrate, to the bursting load close to that of the reference monolith beam and to the best quality in relation to commercial mortar.
DOI: 10.6084/m9.figshare.7244465.v1
title: Water quality index modified by using multivariate analysis: a case study of Pelotas Stream, RS, Brazil

description: ABSTRACT This research aimed at developing a modified water quality index (WQIMod) by using multivariate analysis, from a comparison with the WQI used by the Environmental Company of São Paulo (Companhia Ambiental do Estado de São Paulo-Cetesb) (IQACETESB), to be applied in the Pelotas Stream, RS, Brazil. Secondary data from Pelotas Stream surface water quality were used, collected in the sampling site GER 48, located in the municipality of Pelotas, where they were monitored and provided by the State Foundation of Environmental Protection Henrique Luís Roessler (Fundação Estadual de Proteção Ambiental Henrique Luís Roessler-FEPAM) between 1997 and 2013. Among the multivariate analyses, the factor analysis/principal component analysis (PCA) was used. The results indicated that the PCA extracted two principal components, which explained 100% of the total data variance in the correlation matrix, while the factorial scores for WQIMod calculation were extracted from the first factor, which explained 70.6% of the total data variance. We concluded that the WQIMod exhibits biochemical oxygen demand (BOD5), turbidity (TH) and total solids (TS) as the most important variables for the index construction, differing from the WQICETESB, which shows the variables dissolved oxygen (DO), thermotolerant coliforms (TC) and hydrogenionic potential (pH) as the most relevant ones, indicating the need of WQICETESB calibration for applying in this specific ecosystem.
DOI: 10.7284/135069
title: Anemometer data collected during research cruise SKQ201911T 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.7244456
title: Evaluation of glyphosate effect concentration to control Eichhornia crassipes and Salvinia sp.

description: ABSTRACT The possibility of using herbicides in an aquatic ecosystem, to macrophytes control in unbalanced conditions, led to the need for studies that evaluate the concentration of effect that is effective and ecologically balanced, without causing major impacts to the non-target organisms in the aquatic ecosystem. The glyphosate is the active ingredient of some herbicides and it is known for its efficacy due its broad-spectrum and non-selectivity. This study investigated the minor concentration of effect to control Eichhornia crassipes and Salvinia sp., in experiments conducted in triplicate and observed during a period of 20 days after glyphosate application in the concentrations: 6.25, 12.5, 25.0, 50.0 e 100 L.ha-1. It was verified that only the concentration of 100 L.ha-1 had significant difference of effect when compared to the control. The effect at the end of the twentieth day it was superior to 90%, becoming apparent from the tenth day on. It was observed a small difference in sensibility between the evaluated species; however, the concentration of effect was similar. The dose of 100 L.ha-1 prevented the occurrence of regrowth during thirty days, and caused a residual effect in vegetal species inserted in the environment after the herbicide application.
DOI: 10.6084/m9.figshare.7244459
title: Behavior of fresh-laid mortars composed of crushed limestone sand and natural sand

description: ABSTRACT The goal of this resarch is to identify the behavior of limestone crushed sand in coating mortar. Five trace compositions were proposed and tested: the first one made up of 100% natural sand, which will be used as reference trace, the second composition presented 80% natural sand and 20% limestone rock crushed sand, the third one 60% natural sand and 40% limestone rock crushed sand, the fourth one with 40% natural sand and 60% limestone rock crushed sand, and the fifth trace 20 % natural sand and 80% limestone rock crushed sand. The mortar traces were composed of cement, sand, water and additive, without the presence of lime, and these were tested in the wet state and presented the following results: Composite traces with limestone rock crushed sand presented better performance than the reference trace, which had only natural sand. The traces with 60% natural sand and 40% limestone crushed sand showed better performance, and presented a grain size curve within the optimal upper and lower zone, as required by the standard rules. The relevance of this study is due to the fact that crushed sand is a waste that generates important environmental liability. Therefore, the use of this type of waste makes it possible to reduce this environmental impact.
DOI: 10.6084/m9.figshare.7244459.v1
title: Behavior of fresh-laid mortars composed of crushed limestone sand and natural sand

description: ABSTRACT The goal of this resarch is to identify the behavior of limestone crushed sand in coating mortar. Five trace compositions were proposed and tested: the first one made up of 100% natural sand, which will be used as reference trace, the second composition presented 80% natural sand and 20% limestone rock crushed sand, the third one 60% natural sand and 40% limestone rock crushed sand, the fourth one with 40% natural sand and 60% limestone rock crushed sand, and the fifth trace 20 % natural sand and 80% limestone rock crushed sand. The mortar traces were composed of cement, sand, water and additive, without the presence of lime, and these were tested in the wet state and presented the following results: Composite traces with limestone rock crushed sand presented better performance than the reference trace, which had only natural sand. The traces with 60% natural sand and 40% limestone crushed sand showed better performance, and presented a grain size curve within the optimal upper and lower zone, as required by the standard rules. The relevance of this study is due to the fact that crushed sand is a waste that generates important environmental liability. Therefore, the use of this type of waste makes it possible to reduce this environmental impact.
DOI: 10.6084/m9.figshare.7244456.v1
title: Evaluation of glyphosate effect concentration to control Eichhornia crassipes and Salvinia sp.

description: ABSTRACT The possibility of using herbicides in an aquatic ecosystem, to macrophytes control in unbalanced conditions, led to the need for studies that evaluate the concentration of effect that is effective and ecologically balanced, without causing major impacts to the non-target organisms in the aquatic ecosystem. The glyphosate is the active ingredient of some herbicides and it is known for its efficacy due its broad-spectrum and non-selectivity. This study investigated the minor concentration of effect to control Eichhornia crassipes and Salvinia sp., in experiments conducted in triplicate and observed during a period of 20 days after glyphosate application in the concentrations: 6.25, 12.5, 25.0, 50.0 e 100 L.ha-1. It was verified that only the concentration of 100 L.ha-1 had significant difference of effect when compared to the control. The effect at the end of the twentieth day it was superior to 90%, becoming apparent from the tenth day on. It was observed a small difference in sensibility between the evaluated species; however, the concentration of effect was similar. The dose of 100 L.ha-1 prevented the occurrence of regrowth during thirty days, and caused a residual effect in vegetal species inserted in the environment after the herbicide application.
DOI: 10.7284/135070
title: Anemometer data collected during research cruise SKQ201911T 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.7244444
title: Airborne laser scanning for terrain modeling in the Amazon forest

description: ABSTRACT Very few studies have been devoted to understanding the digital terrain model (DTM) creation for Amazon forests. DTM has a special and important role when airborne laser scanning is used to estimate vegetation biomass. We examined the influence of pulse density, spatial resolution, filter algorithms, vegetation density and slope on the DTM quality. Three Amazonian forested areas were surveyed with airborne laser scanning, and each original point cloud was reduced targeting to 20, 15, 10, 8, 6, 4, 2, 1, 0.75, 0.5 and 0.25 pulses per square meter based on a random resampling process. The DTM from resampled clouds was compared with the reference DTM produced from the original LiDAR data by calculating the deviation pixel by pixel and summarizing it through the root mean square error (RMSE). The DTM from resampled clouds were also evaluated considering the level of agreement with the reference DTM. Our study showed a clear trade-off between the return density and the horizontal resolution. Higher forest canopy density demanded higher return density or lower DTM resolution.
DOI: 10.6084/m9.figshare.7244441
title: Indicators of burnout in Primary Health Care workers

description: ABSTRACT Objective: to analyze the indicators of burnout peculiar to health workers from units of Primary Health Care. Method: integrative review of the literature structured in the stages: guiding question; search; categorization of studies; assessment; discussion; and interpretation of results, and synthesis of knowledge. Search for original articles and reviews published from 2000 to 2016, in Portuguese, English and Spanish, in the main databases of the health area. Descriptors used: Nursing, Burnout and Primary Health Care. Results: 14 articles met the proposed inclusion criteria, six (42.85%) presented a sample of nurses and eight (57.15%) health professionals. Conclusion: Primary Health Care workers are exhausted due to inadequate working conditions characterized by the lack of human and physical resources that leads to work overload, workplace violence and difficulty with teamwork, despite being satisfied with the work environment.
DOI: 10.6084/m9.figshare.7244444.v1
title: Airborne laser scanning for terrain modeling in the Amazon forest

description: ABSTRACT Very few studies have been devoted to understanding the digital terrain model (DTM) creation for Amazon forests. DTM has a special and important role when airborne laser scanning is used to estimate vegetation biomass. We examined the influence of pulse density, spatial resolution, filter algorithms, vegetation density and slope on the DTM quality. Three Amazonian forested areas were surveyed with airborne laser scanning, and each original point cloud was reduced targeting to 20, 15, 10, 8, 6, 4, 2, 1, 0.75, 0.5 and 0.25 pulses per square meter based on a random resampling process. The DTM from resampled clouds was compared with the reference DTM produced from the original LiDAR data by calculating the deviation pixel by pixel and summarizing it through the root mean square error (RMSE). The DTM from resampled clouds were also evaluated considering the level of agreement with the reference DTM. Our study showed a clear trade-off between the return density and the horizontal resolution. Higher forest canopy density demanded higher return density or lower DTM resolution.
DOI: 10.7284/135057
title: Expendable Probe data collected during research cruise SKQ201911T 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.7244435
title: Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR)

description: ABSTRACT The water treatment process generates a residue called water treatment plant (WTP) sludge, which needs to be correctly characterized to ensure appropriate disposal or reuse. This study aimed to characterize the centrifuged sludge produced at the Tamanduá WTP, Iguaçu Falls City, Brazil, and considered opportunities for its reuse in the production of concrete for the civil construction industry. Wet sludge (sludge in its natural form) analysis included the determination of total solids, moisture content, density, pH, and inorganic parameters (As, Al, Ba, Cd, Pb, Cr, F, Hg, Ag, and Se) through thermogravimetric analysis, X-ray diffraction, and chemical analysis by X-ray fluorescence and loss ignition. For calcined WTP sludge, chemical and mineralogical composition and laser granulometry were evaluated. The results indicated that calcined sludge had the potential to be used in the production of cement materials; conversely wet sludge did not reach the appropriate safety standards due to the high quantity of organic matter.
DOI: 10.6084/m9.figshare.7244438
title: Analysis of influence of concrete element format and properties steel fibers on flexural toughness

description: ABSTRACT Concrete characterizing studies with steel fibers starting from the assay of the traction on flexural of prisms to obtain the toughness flexural have being done to the parameterization of the mechanic behavior of concrete pipes with steel fibers. The study aim is to adjust curves modeling the toughness estimates to the flex on concrete pipes in function to the toughness flexural on prims, both with steel fibers randomly oriented and moreover verify if there is or there is not significant statistic difference among toughness average to flexural when compared to the concrete element form (pipe or prism), and the priorities of steel fibers: Form Factor (65 or 80), State (free or joined to the basis comb) and theoretical fiber consumptions (0,25% or 0,38% or 0,50%). Curves were adjusted modeling the concrete pipe toughness with steel fibers in function of prism flexural toughness, being possible to observe that larger is the prism flexural toughness the larger will be the pipe flexural toughness. The analysis of variance was used to evaluate the existence or not of significant statistic difference among double or triple or quadruples associations. It was individually found that there is not significant statistic difference among the average values of toughness flexural, when compared concrete elements forms, however, there is significant statistic average values of toughness flexural when compared: (i) Form Factor; (ii) State and (iii) Theoretical Fiber Consumption. There was influence on the average values of flexural toughness when we make associations among the different levels of form factors, state and theoretical consumptions on fibers.