cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.12171051
title: The challenges of project management in small and medium-sized enterprises: a literature review based on bibliometric software and content analysis

description: Abstract: The purpose of this paper is to design an overview about Project Management (PM) in Small and Medium-Sized Enterprises (SMEs) by analysing the evolution of publications and the main topics since 1996 to 2016 to motivate future research that helps SMEs to apply PM practices more efficiently. This study performed bibliometrics associated with content analysis of publications collected in scientific bases Web of Science and Scopus and in the periodic International Journal of Project Management. For that, the software VOSviewer, Nvivo, Minitab, and Excel were used in the analyses. The scan of 235 papers about Project Management in SMEs supported a literature overview. Furthermore, four thematic categories are highlighted: Project Management Practices, Planning and Control Systems, Collaboration, and Knowledge Management. Moreover, it was observed that SMEs requires a lighter PM methodology, focused on people and flexible. Besides that, the results show that the main challenges involve a lack of resources and qualified people and the high turnover. However, overcoming these issues, PM can benefit growth and innovation in SMEs. Therefore, this study presents a conceptual framework of benefits and challenges in Project Management in SMEs, reducing the research gap. Furthermore, recommendations for future research, mainly in Brazil, are given.
DOI: 10.6084/m9.figshare.12171042
title: Degree of family cohesion and social class are associated with the number of cavitated dental caries in adolescents

description: Abstract The aim of this study was to evaluate the association between number of cavitated dental caries in adolescents and family cohesion, drug use, sociodemographic factors and visits to the dentist. A cross-sectional study was conducted with 746 adolescents aged 15 to 19 years from Campina Grande, Brazil. The parents answered a questionnaire addressing sociodemographic data, and the adolescents answered questionnaires on drug use, type of family cohesion and visits to the dentist. Two examiners underwent training and calibration exercises (K &gt; 0.80) to diagnose dental caries using the Nyvad criteria. A directed acyclic graph was created to select the variables to be controlled in the statistical model. Associations between the independent variables and the outcome were determined using robust Poisson Regression analysis for complex samples (α = 5%). Rate ratios (RR) and 95% confidence intervals (CI) were calculated. The prevalence of dental caries and cavitated lesions among the adolescents was 92.8% and 41.6%, respectively. The following variables remained associated with the number of cavitated lesions in the multivariate analysis: disengaged (RR: 6.30; 95%CI: 1.24–31.88; p = 0.028 ), separated (RR: 4.80; 95%CI: 1.03–22.35; p = 0.046) and connected (RR: 5.23; 95%CI: 1.27–21.59; p = 0.024) levels of family cohesion, and high social class (RR: 0.55; 95%CI: 0.39–0.76; p = 0.001). In conclusion, this paper posits that adolescents with a lower socioeconomic status, and those whose family cohesion was classified as disengaged, separated or connected, had a larger number of cavitated lesions.
DOI: 10.6084/m9.figshare.12171054.v1
title: Perspectives of Mathematics Teachers about Humour and its Educational Value

description: Abstract At present, humour has an increasing acceptance and appreciation, because we recognize the positive contributions to the well-being of people in contexts as diverse as health, business, and entertainment. What happens in Education and, in particular, in Mathematics teaching? To answer this question, we designed this quantitative study with a sample of 1088 Iberian mathematics teachers (Portuguese and Spanish), that teach from the early years through to higher education. Through the use of a questionnaire, we seek to find out if Portuguese and Spanish teachers who teach Mathematics, throughout the various levels of education, appreciate humor, what perspective they have of it and its educational value, and if they use it in teaching the discipline. The study also sought to determine if the teaching level in which teachers teach mathematics has an influence on the perception and use of humor for instructional purposes. The study also investigates if there are any significant differences between Portuguese and Spanish teachers in relation to these aspects. The results show that the overwhelming majority of teachers, at all levels of teaching, recognize the meaning of humor, consider that they have a sense of humor, justify its use in mathematics teaching and have already seen it being used or used it in their classes, with the goal of creating a good learning environment and making students think. The study reveals differences among teachers at different levels of teaching, indicating that there is a greater predisposition of teachers in the initial years, in comparison to other years, to value and use humor in mathematics teaching. The study also reveals differences between Portuguese and Spanish teachers, with Portuguese presenting a higher average agreement in most items.
DOI: 10.6084/m9.figshare.12171042.v1
title: Degree of family cohesion and social class are associated with the number of cavitated dental caries in adolescents

description: Abstract The aim of this study was to evaluate the association between number of cavitated dental caries in adolescents and family cohesion, drug use, sociodemographic factors and visits to the dentist. A cross-sectional study was conducted with 746 adolescents aged 15 to 19 years from Campina Grande, Brazil. The parents answered a questionnaire addressing sociodemographic data, and the adolescents answered questionnaires on drug use, type of family cohesion and visits to the dentist. Two examiners underwent training and calibration exercises (K &gt; 0.80) to diagnose dental caries using the Nyvad criteria. A directed acyclic graph was created to select the variables to be controlled in the statistical model. Associations between the independent variables and the outcome were determined using robust Poisson Regression analysis for complex samples (α = 5%). Rate ratios (RR) and 95% confidence intervals (CI) were calculated. The prevalence of dental caries and cavitated lesions among the adolescents was 92.8% and 41.6%, respectively. The following variables remained associated with the number of cavitated lesions in the multivariate analysis: disengaged (RR: 6.30; 95%CI: 1.24–31.88; p = 0.028 ), separated (RR: 4.80; 95%CI: 1.03–22.35; p = 0.046) and connected (RR: 5.23; 95%CI: 1.27–21.59; p = 0.024) levels of family cohesion, and high social class (RR: 0.55; 95%CI: 0.39–0.76; p = 0.001). In conclusion, this paper posits that adolescents with a lower socioeconomic status, and those whose family cohesion was classified as disengaged, separated or connected, had a larger number of cavitated lesions.
DOI: 10.6084/m9.figshare.12171039
title: Main Hypermarket Meat Purchasing Drivers

description: ABSTRACT Objective: urbanization and migration to large centers has caused changes in the behavior of meat consumers, not only with regards to product choice based on product quality and safety, but also the purchasing process. In this sense, factors such as proximity, product availability, and price are also factors affecting the purchase choices. This work aims to analyze the main factors associated with the consumption of these meats in the Federal District, Brazil, in an attempt to broaden our understanding of what consumers consider important, and to provide guidance. Method: this research was carried out in three different hypermarket networks. A socioeconomic evaluation of the interviewees was carried out, followed by the application of a survey, through structured affirmative sentences that were categorized in sociocultural, economic, health/food and environmental dimensions. The sentences were evaluated using the seven-point Likert scale. Socioeconomic data pertaining the interviewees were analyzed by Chi-square tests and the responses obtained through the Likert scale were transformed into Mean Item Score (MIS). Results and Conclusions: the results indicate that the quality control of the meat exposed in supermarkets and the possibility of finding the same type of meat in several different places are the main factors influencing the purchasing decisions of consumers of these meats.
DOI: 10.6084/m9.figshare.12171036
title: Scanning electron microscopy assessment of the load-bearing capacity of cad/cam-fabricated molar crowns

description: Abstract Although fiber-reinforced composites are commonly used in dental practice, whether fiber-reinforced crowns and fixed partial dentures can be used as definitive prostheses remains to be determined. This study used scanning electron microscopy to evaluate the load-bearing capacity of non-reinforced and fiber-reinforced composite (FRC) molar crowns prepared by computer-aided design/computer-aided manufacturing (CAD/CAM). The crowns were fabricated from three empirical FRC blocks, one empirical composite block, and one commercial ceramic block. The FRC resin was prepared by mixing BaO silicate particles, E-glass fiber, and dimethacrylate resin. Specimens were divided into five groups (n = 10), differing in the amounts of filler, resin, and fiber. Crowns were statically loaded until fracture. One-way analysis of variance and Tukey’s post hoc multiple comparison tests were used for statistical analyses. The groups showed significant differences in load-bearing capacity; empirical bidirectional FRC resin blocks had the highest capacity, while commercial ceramic blocks had the lowest capacity. Molar crowns formed from FRC resin blocks had higher load-bearing capacity compared to non-reinforced composite resin and ceramic blocks. These results show that fiber reinforcement increased the load-bearing capacity of molar crowns.
DOI: 10.6084/m9.figshare.12171039.v1
title: Main Hypermarket Meat Purchasing Drivers

description: ABSTRACT Objective: urbanization and migration to large centers has caused changes in the behavior of meat consumers, not only with regards to product choice based on product quality and safety, but also the purchasing process. In this sense, factors such as proximity, product availability, and price are also factors affecting the purchase choices. This work aims to analyze the main factors associated with the consumption of these meats in the Federal District, Brazil, in an attempt to broaden our understanding of what consumers consider important, and to provide guidance. Method: this research was carried out in three different hypermarket networks. A socioeconomic evaluation of the interviewees was carried out, followed by the application of a survey, through structured affirmative sentences that were categorized in sociocultural, economic, health/food and environmental dimensions. The sentences were evaluated using the seven-point Likert scale. Socioeconomic data pertaining the interviewees were analyzed by Chi-square tests and the responses obtained through the Likert scale were transformed into Mean Item Score (MIS). Results and Conclusions: the results indicate that the quality control of the meat exposed in supermarkets and the possibility of finding the same type of meat in several different places are the main factors influencing the purchasing decisions of consumers of these meats.
DOI: 10.6084/m9.figshare.12171024
title: Combination of membrane processes for desulfation of seawater used for injection in oilfields

description: ABSTRACT Seawater is commonly used in offshore platforms as an injection fluid in secondary oil recovery. However, the sulfate found in seawater has been the cause of many inconveniences, such as the formation of precipitates, which can settle in various parts of the production platform. Nowadays, nanofiltration (NF) is used in sulfate removal units for seawater desulfation, where cartridge filters are commonly used for seawater pretreatment. Suspended solids and microorganisms that have not been retained by the filtration system may deposit on the surface of NF membranes, decreasing system productivity and reducing membrane life. The microfiltration (MF) process can be used as an alternative pretreatment and would allow the removal of these elements. In this study, a combined process of MF and NF for seawater desulfation was developed for injection into oil reservoirs. Permeation modules containing hollow fiber shaped poly (imide) membranes were used in the construction of an MF pilot system, integrated with an NF pilot system similar to those already used on platforms. The performance of the systems was evaluated by monitoring the permeability of both during seawater filtration. Parameters such as degree of water recovery, frequency, and efficiency of backwash procedures and chemical cleaning were also studied. The results showed that MF seawater pretreatment is an effective alternative for NF desulfation.
DOI: 10.6084/m9.figshare.12171036.v1
title: Scanning electron microscopy assessment of the load-bearing capacity of cad/cam-fabricated molar crowns

description: Abstract Although fiber-reinforced composites are commonly used in dental practice, whether fiber-reinforced crowns and fixed partial dentures can be used as definitive prostheses remains to be determined. This study used scanning electron microscopy to evaluate the load-bearing capacity of non-reinforced and fiber-reinforced composite (FRC) molar crowns prepared by computer-aided design/computer-aided manufacturing (CAD/CAM). The crowns were fabricated from three empirical FRC blocks, one empirical composite block, and one commercial ceramic block. The FRC resin was prepared by mixing BaO silicate particles, E-glass fiber, and dimethacrylate resin. Specimens were divided into five groups (n = 10), differing in the amounts of filler, resin, and fiber. Crowns were statically loaded until fracture. One-way analysis of variance and Tukey’s post hoc multiple comparison tests were used for statistical analyses. The groups showed significant differences in load-bearing capacity; empirical bidirectional FRC resin blocks had the highest capacity, while commercial ceramic blocks had the lowest capacity. Molar crowns formed from FRC resin blocks had higher load-bearing capacity compared to non-reinforced composite resin and ceramic blocks. These results show that fiber reinforcement increased the load-bearing capacity of molar crowns.
DOI: 10.6084/m9.figshare.12171021
title: Edaphic fauna affects soybean productivity under no-till system

description: ABSTRACT: This study aimed to evaluate the relationship of edaphic fauna under a no-tillage system with different levels of soybean productivity [High (NTH), Medium (NTM) and Low (NTL)] in the west of Santa Catarina (Brazil), identifying which chemical and physical variables most affect them, and the best indicators that can be used. Native forest (NF) areas were used as a reference. A total of 207 samples of soil fauna were collected by soil monolith and pitfall trap methods over two years of evaluation in four municipalities. Based on edaphic fauna data, Shannon-Wiener (H’), Pielou (J), Dominance (D), Margalef and Fisher Alpha (α) indices were generated, in addition to the average richness and abundance. Data from NTs were submitted to analysis of variance and compared by Tukey's test (p &gt; 0.05). The NF was used as a reference and compared with the agriculture system by Dunnett test (p &gt; 0.05), and regressions between soybean productivity and diversity indices. The H’, Margalef, α indices, and average richness for soil fauna sampled by soil monoliths followed the productivity gradient NTH &gt; NTM &gt; NTL, showing a positive correlation with the increase of soybean productivity. NTH has a diversity index similar to that of NF. Soybean productivity is affected by the richness and diversity of edaphic fauna, but abundance was not sensitive in predicting treatments under no-tillage; Fisher's alpha index was more sensitive in treatment separation with soil monoliths. The environmental variables aluminum, organic matter, phosphorus, potassium and penetration resistance affect the fauna edaphic.
DOI: 10.6084/m9.figshare.12171015
title: Plasma rich in growth factors (PRGF) in non-surgical periodontal therapy: a randomized clinical trial

description: Abstract The aim of this split mouth, double blinded, randomized clinical trial was to evaluate the clinical efficacy of use of Plasma rich in growth factors (PRGF) as an adjunct to scaling and root planing (SRP) in the treatment of periodontal pockets. Twenty six patients (15 males, 11 females) diagnosed with generalized periodontitis with Pocket Depth &gt; 5mm and plaque index score &lt; 1.5, were randomly allocated by using computer generated random sequence, into two groups, one treated with intra-pocket application of PRGF adjunct to SRP and other with SRP alone. The clinical outcomes like pocket depth (PD), relative attachment level (RAL) and sulcus bleeding index (SBI) were assessed at baseline, 3 months and 6 months. Twenty two patients (44 sites) were analyzed at the end of 6 month follow-up, using SPSS 20.0v software. There was a significant statistical difference observed between both the groups favouring SRP +PRGF group in terms of PD (p = 0.007) and RAL (p = 0.021) at the end of 6 month follow-up. Also there was a statistical significant difference (&lt; 0.001) at all time points compared to baseline, for all parameters in intra-group comparison. Moreover, the sites with PD&gt;4mm necessitating further treatment after 6-month follow-up were significantly lesser for SRP+PRGF group. The use of PRGF technology in non-surgical periodontal therapy, by single intra-pocket application in to periodontal pockets as an adjunct to SRP, in chronic periodontitis patients, was found to be effective in reduction of pocket depth and gain in clinical attachment level.
DOI: 10.6084/m9.figshare.12171012
title: Factors associated with toothache among Brazilian adults: a multilevel analysis

description: Abstract The aim of this study was to evaluate the factors associated with toothache in the adult population of Minas Gerais, Brazil. Individual data from a population sample (age 35 to 44 years) were collected from a secondary database of the SB Minas survey. Sampling was carried out by clusters and with multiple drawing stages. The eligibility criteria were to reside in areas chosen for the research, be within the age group, and accept to participate in the research. The individual variables assessed by a questionnaire and dental exams were sex, income, race/skin color, root caries, periodontal condition, need for dental treatment, and last dental appointment. The contextual variables, assessed by municipal indexes, were Human Development Index (HDI), illiteracy, unemployment, half minimum wage, quarter minimum wage, oral health team coverage, access to individual health care, and supervised tooth brushing average. The dependent variable was toothache in the past six months. A descriptive analysis was made using the Statistical Package for the Social Sciences and Hierarchical Linear and Nonlinear Modeling Software was used to perform the multilevel analyses for individual and contextual levels. An association was found between toothache and low income (OR = 2.00; 95%CI = 1.32–3.13), dental caries (OR = 1.86; 95%CI = 1.22–2.86), periodontal condition, and living on a quarter of the minimum wage or less (OR = 1.03; 95%CI = 1.00–1.08). Clinical and social factors were associated with toothache, reinforcing the need to improve public polices in oral health focused on the adult population.
DOI: 10.6084/m9.figshare.12171024.v1
title: Combination of membrane processes for desulfation of seawater used for injection in oilfields

description: ABSTRACT Seawater is commonly used in offshore platforms as an injection fluid in secondary oil recovery. However, the sulfate found in seawater has been the cause of many inconveniences, such as the formation of precipitates, which can settle in various parts of the production platform. Nowadays, nanofiltration (NF) is used in sulfate removal units for seawater desulfation, where cartridge filters are commonly used for seawater pretreatment. Suspended solids and microorganisms that have not been retained by the filtration system may deposit on the surface of NF membranes, decreasing system productivity and reducing membrane life. The microfiltration (MF) process can be used as an alternative pretreatment and would allow the removal of these elements. In this study, a combined process of MF and NF for seawater desulfation was developed for injection into oil reservoirs. Permeation modules containing hollow fiber shaped poly (imide) membranes were used in the construction of an MF pilot system, integrated with an NF pilot system similar to those already used on platforms. The performance of the systems was evaluated by monitoring the permeability of both during seawater filtration. Parameters such as degree of water recovery, frequency, and efficiency of backwash procedures and chemical cleaning were also studied. The results showed that MF seawater pretreatment is an effective alternative for NF desulfation.
DOI: 10.6084/m9.figshare.12171012.v1
title: Factors associated with toothache among Brazilian adults: a multilevel analysis

description: Abstract The aim of this study was to evaluate the factors associated with toothache in the adult population of Minas Gerais, Brazil. Individual data from a population sample (age 35 to 44 years) were collected from a secondary database of the SB Minas survey. Sampling was carried out by clusters and with multiple drawing stages. The eligibility criteria were to reside in areas chosen for the research, be within the age group, and accept to participate in the research. The individual variables assessed by a questionnaire and dental exams were sex, income, race/skin color, root caries, periodontal condition, need for dental treatment, and last dental appointment. The contextual variables, assessed by municipal indexes, were Human Development Index (HDI), illiteracy, unemployment, half minimum wage, quarter minimum wage, oral health team coverage, access to individual health care, and supervised tooth brushing average. The dependent variable was toothache in the past six months. A descriptive analysis was made using the Statistical Package for the Social Sciences and Hierarchical Linear and Nonlinear Modeling Software was used to perform the multilevel analyses for individual and contextual levels. An association was found between toothache and low income (OR = 2.00; 95%CI = 1.32–3.13), dental caries (OR = 1.86; 95%CI = 1.22–2.86), periodontal condition, and living on a quarter of the minimum wage or less (OR = 1.03; 95%CI = 1.00–1.08). Clinical and social factors were associated with toothache, reinforcing the need to improve public polices in oral health focused on the adult population.