cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8227304
title: Association between basic psychological needs of the self-determination theory and perception of group cohesion among high-performance futsal athletes

description: Abstract This study aims to investigate the association between satisfaction of basic psychological needs of the self-determination theory, and perception of group cohesion among male futsal athletes. In total, 301 athletes from 20 teams, participants of the Brazilian Futsal League participated in this study. The instruments used were the Basic Needs Satisfaction in Sport Scale (BNSSS) and the Group Environment Questionnaire (GEQ). Data analysis was conducted through the Structural Equation Modeling. Results revealed that the satisfaction of basic psychological needs presented significant association with group cohesion, explaining 28% of Task Cohesion and 63% of Social Cohesion variances. The satisfaction of the three basic psychological needs is associated with Task Cohesion, while only the satisfaction of basic psychological needs of Relatedness and Competence was associated with Social Cohesion. It was concluded that, in the context of high-performance futsal, the satisfaction of athletes with their basic psychological needs is associated with involvement with team goals and the likelihood of making friends within the group.
DOI: 10.6084/m9.figshare.8227310
title: An Extended Linear Discontinuous Method for One-group Fixed Source Discrete Ordinates Problems with Isotropic Scattering in Slab Geometry

description: ABSTRACT Nowadays, the obtainment of an accurate numerical solution of fixed source discrete ordinates problems is relevant in many areas of engineering and science. In this work, we extend the hybrid Finite Element Spectral Green’s Function method (FEM-SGF), originally developed to solve eigenvalue diffusion problems, for fixed source problems using as a mathematical model, the discrete ordinates formulation in one energy group with isotropic scattering in slab geometry. This new method, Extended Linear Discontinuous Discrete Ordinates (ELD-SN), is based on the use of neutron balance equations and the construction of a hybrid auxiliary equation. This auxiliary equation combines a linear discontinuous approximation and spectral parameters to approximate the neutron angular flux inside the cell. Numerical results for benchmark problems are presented to illustrate the accuracy and computational performance of our methodology. ELD-SN method is free from spatial truncation errors in S 2 quadrature, and generate good results in the other quadrature sets. This method is more accurate than the conventional Diamond Difference (DD) and Linear Discontinuous (LD) methods, but surpassed by the Spectral Green’s Function (SGF) method, for quadrature order greater than two.
DOI: 10.6084/m9.figshare.8227307
title: BIOMECHANICS OF BONE BLOCK GRAFT MODELS OF DIFFERENT GEOMETRY

description: ABSTRACT Objective: To evaluate the mechanical behavior of different geometry bone block grafts in wooden models. Methods: Constructs with rectangular (G1) and trapezoidal (G2) profile “grafts”, fixed with 3.5 mm 8-hole dynamic compression plates were submitted to non-destructive bending, with the load applied alternately on the same surface as that of the plate fixation (upper) and on the opposite surface (lower), and torsion tests. A 50 N maximum load for bending and a 5° maximum deformation for torsion were considered. Rigidity (N/mm) was recorded for the former and torque (N.m) was recorded for the latter. Results: Rigidity was consistently higher in G2 than in G1, but not significantly so for all comparisons. The exception was for the load applied on the same surface of plate fixation, significantly higher in G1 than in G2. Torque was higher in G1, but not significantly so. Conclusion: The two different-profile “grafts” present a similar mechanical behavior and can be indistinctly used in clinical practice. Level of evidence V, specialist's opinion based on basic studies.
DOI: 10.6084/m9.figshare.8227310.v1
title: An Extended Linear Discontinuous Method for One-group Fixed Source Discrete Ordinates Problems with Isotropic Scattering in Slab Geometry

description: ABSTRACT Nowadays, the obtainment of an accurate numerical solution of fixed source discrete ordinates problems is relevant in many areas of engineering and science. In this work, we extend the hybrid Finite Element Spectral Green’s Function method (FEM-SGF), originally developed to solve eigenvalue diffusion problems, for fixed source problems using as a mathematical model, the discrete ordinates formulation in one energy group with isotropic scattering in slab geometry. This new method, Extended Linear Discontinuous Discrete Ordinates (ELD-SN), is based on the use of neutron balance equations and the construction of a hybrid auxiliary equation. This auxiliary equation combines a linear discontinuous approximation and spectral parameters to approximate the neutron angular flux inside the cell. Numerical results for benchmark problems are presented to illustrate the accuracy and computational performance of our methodology. ELD-SN method is free from spatial truncation errors in S 2 quadrature, and generate good results in the other quadrature sets. This method is more accurate than the conventional Diamond Difference (DD) and Linear Discontinuous (LD) methods, but surpassed by the Spectral Green’s Function (SGF) method, for quadrature order greater than two.
DOI: 10.6084/m9.figshare.8227313.v1
title: Mathematical Modeling and Parameter Estimation of Battery Lifetime using a Combined Electrical Model and a Genetic Algorithm

description: ABSTRACT In this paper, a parametrization methodology based on the Genetic Algorithm meta-heuristic is proposed for the Chen and Rincón-Mora model parameter estimation, this model is utilized for the mathematical modeling of the Lithium-ion Polymer batteries lifetime used on mobile devices. The model is also parameterized using the conventional procedure, which is based on the visual analysis of pulsed discharge curves, as presented in the literature. For both parametrization procedures, and for the model validation, experimental data obtained from a platform test are used. The simulations results show that the proposed Genetic Algorithm is able to parametrize the model with better efficacy, presenting lower mean error, and it is also a more agile process than the conventional one, been less subject to subjective aspects.
DOI: 10.6084/m9.figshare.8227301
title: Optimization of the Size of Thread Pool in Runtime Systems to Enterprise Application Integration: A Mathematical Modelling Approach

description: ABSTRACT Companies seek technological alternatives that provide competitiveness for their business processes. One of them is integration platforms, software tools that build integration solutions, which allow the different applications that make up the software ecosystem to work synchronously and that new applications or functionality be incorporated with the least impact in the existing ones. The runtime system is the component of the integration platform responsible for managing the computational resources that run the integration solution. Among these resources are the processing units, called threads, or sets of those threads, called thread pools. The performance of the runtime systems is directly related to the number of threads available to run the integration solution, but scaling the number of threads that provide a shorter response time is a challenge for software engineers. If this quantity is undersized, it may cause a delay in the execution; if it is overestimated, it could cause a waste of computational resources. This article presents a mathematical model, defined by differential equations, that establishes the optimum number of threads, which maximizes the expected performance gain by minimizing the execution time of the integration solution. In addition, it presents the mathematical model application, which assists the analysis of the expected gain in different architecture scenarios and quantity of threads.
DOI: 10.6084/m9.figshare.8227307.v1
title: BIOMECHANICS OF BONE BLOCK GRAFT MODELS OF DIFFERENT GEOMETRY

description: ABSTRACT Objective: To evaluate the mechanical behavior of different geometry bone block grafts in wooden models. Methods: Constructs with rectangular (G1) and trapezoidal (G2) profile “grafts”, fixed with 3.5 mm 8-hole dynamic compression plates were submitted to non-destructive bending, with the load applied alternately on the same surface as that of the plate fixation (upper) and on the opposite surface (lower), and torsion tests. A 50 N maximum load for bending and a 5° maximum deformation for torsion were considered. Rigidity (N/mm) was recorded for the former and torque (N.m) was recorded for the latter. Results: Rigidity was consistently higher in G2 than in G1, but not significantly so for all comparisons. The exception was for the load applied on the same surface of plate fixation, significantly higher in G1 than in G2. Torque was higher in G1, but not significantly so. Conclusion: The two different-profile “grafts” present a similar mechanical behavior and can be indistinctly used in clinical practice. Level of evidence V, specialist's opinion based on basic studies.
DOI: 10.6084/m9.figshare.8227301.v1
title: Optimization of the Size of Thread Pool in Runtime Systems to Enterprise Application Integration: A Mathematical Modelling Approach

description: ABSTRACT Companies seek technological alternatives that provide competitiveness for their business processes. One of them is integration platforms, software tools that build integration solutions, which allow the different applications that make up the software ecosystem to work synchronously and that new applications or functionality be incorporated with the least impact in the existing ones. The runtime system is the component of the integration platform responsible for managing the computational resources that run the integration solution. Among these resources are the processing units, called threads, or sets of those threads, called thread pools. The performance of the runtime systems is directly related to the number of threads available to run the integration solution, but scaling the number of threads that provide a shorter response time is a challenge for software engineers. If this quantity is undersized, it may cause a delay in the execution; if it is overestimated, it could cause a waste of computational resources. This article presents a mathematical model, defined by differential equations, that establishes the optimum number of threads, which maximizes the expected performance gain by minimizing the execution time of the integration solution. In addition, it presents the mathematical model application, which assists the analysis of the expected gain in different architecture scenarios and quantity of threads.
DOI: 10.6084/m9.figshare.8227295
title: Effect of periodization on the physical capacities of basketball players of a military school

description: Abstract Basketball is a sport modality that imposes important physiological loads on players during competition. The aim of the study was to verify the effect of training with wave periodization on the physical capacities of athletes. Explosive strength of lower limbs; aerobic resistance; maximum strength of upper limb; and resting heart rate (HRrest) at PRE and POST moments of 16 athletes submitted to a 4-month training period were evaluated. The internal training load was monitored by the method proposed by Carl Foster in each training session. Statistically significant differences were observed in VO2max of 50.5± 4.9 vs. 54.0± 6.1 ml/kg/min (p &lt;0.000), in the vertical impulse of 39.1± 5.9 cm vs. 44.7± 5.9 cm (p &lt;0.000), 10 RM on bench press 40.4± 9.4 vs. 48.0± 8.9 kg (p &lt;0.000) and in HRrest 66± 4 vs. 60± 5 bpm (p &lt;0.000). The average internal training load was 751± 249 AU. It was concluded that school basketball athletes submitted to training macrocycle with 4-month wave periodization improve the strength of lower and upper limbs, also presenting positive adaptations in aerobic conditioning.
DOI: 10.6084/m9.figshare.8227295.v1
title: Effect of periodization on the physical capacities of basketball players of a military school

description: Abstract Basketball is a sport modality that imposes important physiological loads on players during competition. The aim of the study was to verify the effect of training with wave periodization on the physical capacities of athletes. Explosive strength of lower limbs; aerobic resistance; maximum strength of upper limb; and resting heart rate (HRrest) at PRE and POST moments of 16 athletes submitted to a 4-month training period were evaluated. The internal training load was monitored by the method proposed by Carl Foster in each training session. Statistically significant differences were observed in VO2max of 50.5± 4.9 vs. 54.0± 6.1 ml/kg/min (p &lt;0.000), in the vertical impulse of 39.1± 5.9 cm vs. 44.7± 5.9 cm (p &lt;0.000), 10 RM on bench press 40.4± 9.4 vs. 48.0± 8.9 kg (p &lt;0.000) and in HRrest 66± 4 vs. 60± 5 bpm (p &lt;0.000). The average internal training load was 751± 249 AU. It was concluded that school basketball athletes submitted to training macrocycle with 4-month wave periodization improve the strength of lower and upper limbs, also presenting positive adaptations in aerobic conditioning.
DOI: 10.6084/m9.figshare.8227286
title: Comparison between two generations to verify the morphological changes in female futsal athletes in a period of 10 years

description: Abstract The aim was to compare two generations to verify the morphological changes in female futsal athletes. Age, years of playing, anthropometry measurements, percentage body fat and somatotype were compared between professional athletes in 2001 (n=112) and 2011 (n=115). The 2011 group revealed a significant longer practice time (9.0±4.3 vs. 5.7±3.5 years; p&lt;0.001), higher thigh skinfold (26.1±8.5 vs. 22.5±6.7 mm; p&lt;0.001), circumference of tensed forearm (27.4±2.1 vs. 26.7±2.1 cm; p=0.007), mesomorphy (4.1 vs. 3.3; p=0.001) and lower supraspinale skinfold (14.0±5.0 vs. 19.1±7.4 mm; p&lt;0.001), trunk/extremity relationship (0.8±0.3 vs. 1.1±0.1; p&lt;0.001) and endomorphy (4.5 vs. 5.0; p=0.009) than those of the 2001 athletes. Comparison in playing positions revealed that the 2011 goalkeepers (9.5±5.0 vs. 6.3±3.4 years; p=0.027), wings (9.0±4.3 vs. 5.4±3.2 years; p=0.001) and fixed (8.4±4.3 vs. 6.9±4.5 years; p=0.001) practiced more time than the 2001 athletes, whereas the somatotype profile of goalkeepers (4.6±1.0 vs. 3.4±1.1; p=0.001), wings (3.9±0.8 vs. 3.0±0.9; p=0.001), pivots (3.8±1.0 vs. 3.4±1.0; p=0.028) and fixed (4.3±0.9 vs. 3.7±1.0; p=0.036) registered a higher mesomorphy rate than that of the 2001 athletes, respectively. We may conclude that the 2011 group showed a significant increase in practicing time, coupled to higher mesomorphy and lower endomorphy rates than those experienced by the 2001 athletes.
DOI: 10.6084/m9.figshare.8227286.v1
title: Comparison between two generations to verify the morphological changes in female futsal athletes in a period of 10 years

description: Abstract The aim was to compare two generations to verify the morphological changes in female futsal athletes. Age, years of playing, anthropometry measurements, percentage body fat and somatotype were compared between professional athletes in 2001 (n=112) and 2011 (n=115). The 2011 group revealed a significant longer practice time (9.0±4.3 vs. 5.7±3.5 years; p&lt;0.001), higher thigh skinfold (26.1±8.5 vs. 22.5±6.7 mm; p&lt;0.001), circumference of tensed forearm (27.4±2.1 vs. 26.7±2.1 cm; p=0.007), mesomorphy (4.1 vs. 3.3; p=0.001) and lower supraspinale skinfold (14.0±5.0 vs. 19.1±7.4 mm; p&lt;0.001), trunk/extremity relationship (0.8±0.3 vs. 1.1±0.1; p&lt;0.001) and endomorphy (4.5 vs. 5.0; p=0.009) than those of the 2001 athletes. Comparison in playing positions revealed that the 2011 goalkeepers (9.5±5.0 vs. 6.3±3.4 years; p=0.027), wings (9.0±4.3 vs. 5.4±3.2 years; p=0.001) and fixed (8.4±4.3 vs. 6.9±4.5 years; p=0.001) practiced more time than the 2001 athletes, whereas the somatotype profile of goalkeepers (4.6±1.0 vs. 3.4±1.1; p=0.001), wings (3.9±0.8 vs. 3.0±0.9; p=0.001), pivots (3.8±1.0 vs. 3.4±1.0; p=0.028) and fixed (4.3±0.9 vs. 3.7±1.0; p=0.036) registered a higher mesomorphy rate than that of the 2001 athletes, respectively. We may conclude that the 2011 group showed a significant increase in practicing time, coupled to higher mesomorphy and lower endomorphy rates than those experienced by the 2001 athletes.
DOI: 10.6084/m9.figshare.8227277
title: Training intensity distribution of young elite soccer players

description: Abstract The current study described the training load and intensity distribution of 30 elite Under 20 soccer players (17.9 ± 0.6 years, 180.3 ± 5.7 cm, 73.7 ± 8.8kg) from a 3-time FIFA Club World Cup champion. Session-rating of perceived exertion (s-RPE), internal training load (ITL) and monotony were recorded across 40 training sessions. Mixed-effects modeling was used for data analysis. The athletes performed 33.0 ± 6.9 out of 40 planned training sessions. Most common reasons for absence from training included sickness or minor injuries. Overall, these training sessions summed 2928.7 ± 627.6 minutes. Athletes performed significantly more training sessions at low and moderate intensity zones than at high-intensity zone (p &lt;0.0001). The current data indicate that elite young soccer players perform their training sessions predominantly at the low-intensity zone. Training monitoring is an important aspect of the sport training process evolution. In fact, previous evidence has already shown that an appropriate intensity distribution prevents maladaptation from sports training and may optimize athletic performance. Therefore, coaches should implement strategies to monitor training loads during pre-season and competitive periods.
DOI: 10.6084/m9.figshare.8227280
title: Markov Chain Application for Dry and Rainy Days

description: Abstract Rainfall is an important meteorological phenomenon in the tropical region, characterized by its spatial-temporal variability and associated extreme events. Thus, prior notification of the occurrence of one day being rainy or dry is extremely important for many human activities, especially for agriculture. The aim of this study was to analyze the occurrence of dry and rainy days in Rio Largo-Alagoas, Brazil, using the Markov chain. Daily rainfall data between 1973 and 2008 were used. It was considered six precipitation levels for dry and wet days and, it was applied to Markov chain to identify the probabilities of conditional occurrences of dry and rainy days. The study region had dry (September to March) and rainy (April to August) seasons well defined considered limits of precipitation values between 0 and 2 mm. Higher occurrences of dry and rainy days occurred from November to December (94%) and June to July (84%), respectively. The Markov chain concluded that the transition between dry and rainy days is low throughout the year.
DOI: 10.6084/m9.figshare.8227274
title: Esquema Explícito Semi-Analítico para a Solução da Equação da Onda Unidimensional com Condições de Contorno Naturais

description: ABSTRACT This paper discusses the development of an semi-analytical explicit scheme for solving the non-homogeneous one-dimensional wave equation. A space-time mesh was constructed through the incremental relation c Δ t = Δ x, such that control volume were formed from the characteristic lines of said equation. Schemes were developed from the integral form of the conservation law on these control volumes. They have the property of null local truncation error, even in cases not homogeneous or generalized solution. The method facilitates the inclusion of the initial and boundary conditions, also inserted without the need for approximation techniques. Considering the developments and numerical experiments performed, we conclude that the proposed scheme is an excellent numerical technique, with great accuracy and robustness to solve the one-dimensional linear wave problem.
DOI: 10.6084/m9.figshare.8227277.v1
title: Training intensity distribution of young elite soccer players

description: Abstract The current study described the training load and intensity distribution of 30 elite Under 20 soccer players (17.9 ± 0.6 years, 180.3 ± 5.7 cm, 73.7 ± 8.8kg) from a 3-time FIFA Club World Cup champion. Session-rating of perceived exertion (s-RPE), internal training load (ITL) and monotony were recorded across 40 training sessions. Mixed-effects modeling was used for data analysis. The athletes performed 33.0 ± 6.9 out of 40 planned training sessions. Most common reasons for absence from training included sickness or minor injuries. Overall, these training sessions summed 2928.7 ± 627.6 minutes. Athletes performed significantly more training sessions at low and moderate intensity zones than at high-intensity zone (p &lt;0.0001). The current data indicate that elite young soccer players perform their training sessions predominantly at the low-intensity zone. Training monitoring is an important aspect of the sport training process evolution. In fact, previous evidence has already shown that an appropriate intensity distribution prevents maladaptation from sports training and may optimize athletic performance. Therefore, coaches should implement strategies to monitor training loads during pre-season and competitive periods.
DOI: 10.6084/m9.figshare.8227280.v1
title: Markov Chain Application for Dry and Rainy Days

description: Abstract Rainfall is an important meteorological phenomenon in the tropical region, characterized by its spatial-temporal variability and associated extreme events. Thus, prior notification of the occurrence of one day being rainy or dry is extremely important for many human activities, especially for agriculture. The aim of this study was to analyze the occurrence of dry and rainy days in Rio Largo-Alagoas, Brazil, using the Markov chain. Daily rainfall data between 1973 and 2008 were used. It was considered six precipitation levels for dry and wet days and, it was applied to Markov chain to identify the probabilities of conditional occurrences of dry and rainy days. The study region had dry (September to March) and rainy (April to August) seasons well defined considered limits of precipitation values between 0 and 2 mm. Higher occurrences of dry and rainy days occurred from November to December (94%) and June to July (84%), respectively. The Markov chain concluded that the transition between dry and rainy days is low throughout the year.