scholarly journals Relación entre la estabilidad del core y el equilibrio postural en las habilidades biomotoras de los jóvenes atletas de baloncesto: una revisión sistemática (Relationship between Core Stability and Postural Balance on the Biomotor Capabilities of Young B

Retos ◽  
2021 ◽  
Vol 44 ◽  
pp. 749-755
Author(s):  
Caio Bueno da Silva Sartori Caio Sartori ◽  
Paulo Cesar Montagner ◽  
João Paulo Borin
Keyword(s):  
Athletic Performance ◽  
Postural Balance ◽  
High Performance ◽  
Performance Test ◽  
Exercise Intervention ◽  
Experimental Studies ◽  
Core Stability ◽  
Basketball Players ◽  
Positive Effects ◽  
Revisión Sistemática

El baloncesto requiere exigencias físicas variadas, caracterizadas por esfuerzos intermitentes y situaciones de desequilibrio. Core Stability (EC) y Postural Balance (EP) son temas asociados como un factor significativo en la prevención de lesiones y dolor. Sin embargo, los resultados de los estudios en relación con las habilidades biomotoras son contrastantes, lo que indica que no hay efectos sobre el rendimiento deportivo en el contexto de alto rendimiento, pero es necesario profundizar las investigaciones sobre esta relación en la población adolescente.El objetivo del estudio fue verificar la relación entre la EC y la EP sobre las habilidades biomotoras en practicantes de baloncesto adolescentes. Utilizando la estrategia PICO, se realizaron búsquedas en las bases de datos PubMed y Scielo, buscando estudios experimentales con intervención de ejercicios EC / EP y pruebas de rendimiento atlético. Los resultados apuntan pocos estudios con efectos positivos sobre el rendimiento deportivo de los jóvenes atletas de baloncesto, pero no fue posible identificar pruebas sólidas de la influencia positiva del entrenamiento de EC / EP en las habilidades biomotoras de los adolescentes practicantes de baloncesto. Es necesario realizar más investigaciones sobre la influencia en los indicadores de rendimiento deportivo. Abstract. Basketball demands varied physical demands, characterized by intermittent efforts and situations of imbalance. Core Stability (EC) and Postural Balance (EP) are themes that have been associated as a significant factor in the prevention of injuries and pain. However, the results of studies in relation to biomotor skills are contrasting, indicating that there are no effects on athletic performance in the context of high performance, but investigations on this relationship in the adolescent population need to be further investigated. The aim of the study was to verify the relationship between EC and PE on biomotor skills in adolescent basketball players. Using the PICOS strategy, searches were performed in the PubMed and Scielo databases, looking for experimental studies with EC / EP exercise intervention and athletic performance test. The results point to studies with positive effects on the athletic performance of young basketball athletes, however few among them used a specific additional intervention. There is a need for further investigation regarding the influence on athletic performance indicators.

scholarly journals Efectos del entrenamiento en intervalos de alta intensidad en adultos mayores: una revisión sistemática (Effects of high-intensity interval training in older adults: a systematic review)

2021 ◽  
Vol 16 (48) ◽  
Keyword(s):  
Systematic Review ◽  
Functional Capacity ◽  
High Intensity ◽  
Web Of Science ◽  
Experimental Studies ◽  
Interval Training ◽  
The Elderly ◽  
Positive Effects ◽  
Revisión Sistemática ◽  
High Intensity Interval

El objetivo de este estudio fue realizar una revisión sistemática de la literatura sobre las características de los programas de entrenamiento basados en la modalidad de intervalos de alta intensidad (HIIT, siglas en inglés) en adultos mayores, y a su vez, describir los efectos sobre la capacidad física y funcional en esta población. Se realizó una búsqueda de literatura de 5 bases de datos (DIALNET, DOAJ, Elsevier, PubMed y Web of Science). Los criterios de inclusión incluyeron estudios experimentales aplicados en personas mayores de 60 años. La escala PEDro se utilizó para la evaluación de la calidad de los estudios elegibles. La búsqueda identificó 126 artículos y se evaluaron 12 artículos en texto completo. Todos los estudios eran de buena calidad metodólogica y tenían un bajo riesgo de sesgo. En conclusión, el entrenamiento HIIT ha sido aplicado por un periodo de 6 a 16 semanas, en la modalidad “HIIT-aeróbico” con efectos positivos sobre la capacidad aeróbica y funcional de las personas mayores, además ha reducido la carga patológica en artritis reumatoidea, obesidad y/o dinapenia. === The objective of this study was to do a systematic review of the literature about the characteristics of training programs based on the high intensity interval modality (HIIT) in elderly, and at the same time, to describe the effects on physical and functional capacity in this population. A literature search of 5 databases (DIALNET, DOAJ, Elsevier, PubMed and Web of Science) was performed. The inclusion criteria included experimental studies applied in people older than 60 years. The PEDro scale was used for quality evaluation of eligible studies. The search identified 126 articles and evaluated 12 articles in full text. All studies were of good methodological quality and had a low risk of bias. In conclusion, HIIT training has been applied for a period of 6 to 16 weeks, in the “HIIT-aerobic” modality with positive effects about the aerobic and functional capacity of the elderly, it has also reduced the pathological burden in rheumatoid arthritis, obesity and / or dynapenia.

DIESEL ENGINE OPERATION IN USE OF FUEL WITH ADDITIVES

2018 ◽  
pp. 18-24
Author(s):  
Petar Kazakov ◽  
Atanas Iliev ◽  
Emil Marinov
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Experimental Studies ◽  
Combustion Engines ◽  
Engine Operation ◽  
Factors Affecting ◽  
Operating Modes ◽  
Positive Effects

Over the decades, more attention has been paid to emissions from the means of transport and the use of different fuels and combustion fuels for the operation of internal combustion engines than on fuel consumption. This, in turn, enables research into products that are said to reduce fuel consumption. The report summarizes four studies of fuel-related innovation products. The studies covered by this report are conducted with diesel fuel and usually contain diesel fuel and three additives for it. Manufacturers of additives are based on already existing studies showing a 10-30% reduction in fuel consumption. Comparative experimental studies related to the use of commercially available diesel fuel with and without the use of additives have been performed in laboratory conditions. The studies were carried out on a stationary diesel engine СМД-17КН equipped with brake КИ1368В. Repeated results were recorded, but they did not confirm the significant positive effect of additives on specific fuel consumption. In some cases, the factors affecting errors in this type of research on the effectiveness of fuel additives for commercial purposes are considered. The reasons for the positive effects of such use of additives in certain engine operating modes are also clarified.

Non-stigmatising alternatives to anti-obesity public health messages: Consequences for health behaviour and well-being

2021 ◽  
pp. 135910532199970
Author(s):  
Joanne A Rathbone ◽  
Tegan Cruwys ◽  
Jolanda Jetten
Keyword(s):  
Public Health ◽  
Weight Loss ◽  
Experimental Studies ◽  
Health Behaviours ◽  
Well Being ◽  
Health Messages ◽  
Total N ◽  
Positive Effects ◽  
Public Health Messages ◽  
Size Acceptance

This project investigated how alternative non-stigmatising public health messages influence people’s health behaviours and well-being, relative to traditional stigmatising weight-loss messages. We conducted three experimental studies (total N = 1281) that compared traditional weight-loss messages to weight-neutral messages (Study 1), weight-inclusive messages (Study 2) and size acceptance messages (Study 3). Results revealed that public health messages have differential effects on health behaviours and well-being, depending on the audience’s BMI or perceived weight. However, campaigns that challenge weight stigma and promote body positivity have positive effects on some psychological indicators of health and well-being for people of all body sizes.

scholarly journals Development of High-Performance Face Gear Set (Machining and Performance Test)

2011 ◽  
Vol 77 (775) ◽  
pp. 573-581
Author(s):  
Isamu TSUJI ◽  
Hiroshi GUNBARA ◽  
Kazumasa KAWASAKI ◽  
Yoshikazu ABE ◽  
Kazutaka SUZUKI ◽  
...  
Keyword(s):  
High Performance ◽  
Performance Test ◽  
Face Gear ◽  
And Performance

scholarly journals Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4425
Author(s):  
Ana María Pineda-Reyes ◽  
María R. Herrera-Rivera ◽  
Hugo Rojas-Chávez ◽  
Heriberto Cruz-Martínez ◽  
Dora I. Medina
Keyword(s):  
Carbon Monoxide ◽  
High Performance ◽  
Gas Sensing ◽  
Experimental Studies ◽  
Electrical Performance ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Recent Advances ◽  
Sensitivity And Selectivity ◽  
Doped Zno

Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

scholarly journals Effective Programs in Elementary Mathematics: A Meta-Analysis

AERA Open ◽  
2021 ◽  
Vol 7 ◽  
pp. 233285842098621
Author(s):  
Marta Pellegrini ◽  
Cynthia Lake ◽  
Amanda Neitzel ◽  
Robert E. Slavin
Keyword(s):  
Professional Development ◽  
Elementary Mathematics ◽  
Meta Analysis ◽  
Experimental Studies ◽  
Positive Outcomes ◽  
Classroom Organization ◽  
Benchmark Assessment ◽  
Positive Effects ◽  
Organization And Management ◽  
Achievement Outcomes

This article reviews research on the achievement outcomes of elementary mathematics programs; 87 rigorous experimental studies evaluated 66 programs in grades K–5. Programs were organized in six categories. Particularly positive outcomes were found for tutoring programs (effect size [ES] = +0.20, k = 22). Positive outcomes were also seen in studies focused on professional development for classroom organization and management (e.g., cooperative learning; ES = +0.19, k = 7). Professional development approaches focused on helping teachers gain in understanding of mathematics content and pedagogy had little impact on student achievement. Professional development intended to help in the adoption of new curricula had a small but significant impact for traditional (nondigital) curricula (ES = +0.12, k = 7), but not for digital curricula. Traditional and digital curricula with limited professional development, as well as benchmark assessment programs, found few positive effects.

scholarly journals Computational Molecular Modeling of Transport Processes in Nanoporous Membranes

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 124 ◽  
Author(s):  
Kevin Hinkle ◽  
Xiaoyu Wang ◽  
Xuehong Gu ◽  
Cynthia Jameson ◽  
Sohail Murad
Keyword(s):  
Molecular Modeling ◽  
Temporal Resolution ◽  
High Performance ◽  
Low Cost ◽  
Membrane Surface ◽  
Experimental Studies ◽  
Nanoporous Materials ◽  
Transport Processes ◽  
Zeolite Membrane ◽  
Nanoporous Membranes

In this report we have discussed the important role of molecular modeling, especially the use of the molecular dynamics method, in investigating transport processes in nanoporous materials such as membranes. With the availability of high performance computers, molecular modeling can now be used to study rather complex systems at a fraction of the cost or time requirements of experimental studies. Molecular modeling techniques have the advantage of being able to access spatial and temporal resolution which are difficult to reach in experimental studies. For example, sub-Angstrom level spatial resolution is very accessible as is sub-femtosecond temporal resolution. Due to these advantages, simulation can play two important roles: Firstly because of the increased spatial and temporal resolution, it can help understand phenomena not well understood. As an example, we discuss the study of reverse osmosis processes. Before simulations were used it was thought the separation of water from salt was purely a coulombic phenomenon. However, by applying molecular simulation techniques, it was clearly demonstrated that the solvation of ions made the separation in effect a steric separation and it was the flux which was strongly affected by the coulombic interactions between water and the membrane surface. Additionally, because of their relatively low cost and quick turnaround (by using multiple processor systems now increasingly available) simulations can be a useful screening tool to identify membranes for a potential application. To this end, we have described our studies in determining the most suitable zeolite membrane for redox flow battery applications. As computing facilities become more widely available and new computational methods are developed, we believe molecular modeling will become a key tool in the study of transport processes in nanoporous materials.

scholarly journals Impact of Exercise-Induced Muscle Damage on Performance Test Outcomes in Elite Female Basketball Players

2018 ◽  
Vol 32 (6) ◽  
pp. 1731-1738 ◽  
Author(s):  
Kenji Doma ◽  
Anthony Leicht ◽  
Wade Sinclair ◽  
Moritz Schumann ◽  
Felipe Damas ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Performance Test ◽  
Basketball Players ◽  
Exercise Induced ◽  
Test Outcomes

An analytical model for predicting the shear strength of unsaturated soils

2022 ◽  
pp. 1-57
Author(s):  
Tuan A. Pham ◽  
Melis Sutman
Keyword(s):  
Shear Strength ◽  
Analytical Model ◽  
Unsaturated Soils ◽  
High Performance ◽  
Micromechanical Model ◽  
Experimental Studies ◽  
Stress Equilibrium ◽  
Proposed Model ◽  
New Equation ◽  
Multi Phase

The prediction of shear strength for unsaturated soils remains to be a significant challenge due to their complex multi-phase nature. In this paper, a review of prior experimental studies is firstly carried out to present important pieces of evidence, limitations, and some design considerations. Next, an overview of the existing shear strength equations is summarized with a brief discussion. Then, a micromechanical model with stress equilibrium conditions and multi-phase interaction considerations is presented to provide a new equation for predicting the shear strength of unsaturated soils. The validity of the proposed model is examined for several published shear strength data of different soil types. It is observed that the shear strength predicted by the analytical model is in good agreement with the experimental data, and get high performance compared to the existing models. The evaluation of the outcomes with two criteria, using average relative error and the normalized sum of squared error, proved the effectiveness and validity of the proposed equation. Using the proposed equation, the nonlinear relationship between shear strength, saturation degree, volumetric water content, and matric suction are observed.

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