bluuebunny/crossref_metadata_2025_split huggingface dataset:
Análisis de las variables cinemáticas en la técnica del pateo en el fútbol a partir de criterios de eficiencia biomecánicos
Authors: Camacaro Marelvy , Colina Alberto , Zissu Mihai 
Published: August 2021

La presente investigación se realizó con el objetivo de analizar las variables cinemáticas que se manifiestan en la técnica del pateo en el fútbol a partir de criterios de eficiencia biomecánicos. Fue una investigación de nivel descriptivo, con un diseño de campo, basado en un estudio de caso con una atleta de 15 años. Se utilizó el método videográfico tridimensional (3D) con los enfoques: cuantitativo (programa “Human v 5.0”) y cualitativo (escala Likert). Se cuantificaron las variables cinemáticas mediante pre y pos test. Se establecieron criterios de eficiencia para optimizar variables biomecánicas en las fases: Preparatoria y Pateo. Así, se orientó el entrenamiento de la adolescente en función de fortalezas y debilidades identificadas desde la perspectiva biomecánica, lo que permitió optimizar la técnica de los miembros inferiores, dominante y no dominante. Entre otros resultados, destacó el aumento de sincronización y consecuente mejoría del patrón temporal de movimiento lo que facilitó la coordinación de impulso parcial, y por ende la transferencia de energía del cuerpo hacia el balón, incidiendo positivamente en la velocidad resultante, trayectoria y precisión del balón con lo cual aumentó la frecuencia del gol, hecho que incidió en el rendimiento y perfil de la joven, destacándose en la posición lateral con un manejo eficiente del balón por ambos perfiles.
The present investigation was carried out with the objective of analyzing the kinematic variables that are manifested in the kicking technique in soccer based on biomechanical efficiency criteria. It was a descriptive level investigation, with a field design, based on a case study with a 15-year-old athlete. The three-dimensional (3D) videographic method was used with the approaches: quantitative (“Human v 5.0” program) and qualitative (Likert scale). Kinematic variables were quantified by pre and posttest. Efficiency criteria were established to optimize biomechanical variables in the phases: Preparatory and Kicking. Thus, the adolescent's training was oriented according to the strengths and weaknesses identified from the biomechanical perspective, which allowed optimizing the technique of the dominant and non-dominant lower limbs. Among other results, the increase in synchronization and consequent improvement in the temporal pattern of movement stood out, which facilitated the coordination of partial impulse, and therefore the transfer of energy from the body to the ball, positively influencing the resulting speed, trajectory and precision of the ball which increased the frequency of the goal, a fact that affected the performance and profile of the young woman, standing out in the lateral position with an efficient handling of the ball by both profile.
Alteraciones en la presión plantar posterior a un protocolo de fatiga neuromuscular en máquina isoinercial
Authors: Rodriguez Perdomo Leonardo , Rincón Yepes Camilo Andres , Vargas Santiago Miller Esneyder 
Published: August 2021

El objetivo del presente estudio fue establecer las diferencias que se presentan en la huella plantar tras aplicar un protocolo de fatiga neuromuscular. Un total de 10 deportistas varones sanos con una edad aproximada de 21 años fueron evaluados para el componente morfológico, con el equipo Tanita BC585F® (variables: kg de peso, kg de grasa, kg de músculo y kg de hueso). En el protocolo de fatiga se utilizó el equipo isoinercial Squat RSP®. Para la prueba de baropodometría, tanto en el pre-test como en el post-test, se utilizó el equipo EcoWalk. Se tomaron variables de presión R-Type® para ambos pies, como presión media, superficie de contacto, distribución anterior, posterior, lateral derecha y lateral izquierda. No se encontraron diferencias significativas en el pre y post test de la prueba de baropodometría con una p>0.05. Se encontraron correlaciones significativas entre el componente morfológico y la baropodometría con una p<0.05.
The objective of the present study sought to establish the differences presented in the plantar footprint after applying a neuromuscular fatigue protocol. A total of 10 healthy male athletes with an approximate age of 21 years were evaluated for the morphological component, with the Tanita BC585F® equipment (variables: weight Kg, fat KG, muscle Kg and bone Kg). In the fatigue protocol, the isoinertial Squat RSP® equipment was used. For the baropodometry test, both in the pre-test and in the post-test, the EcoWalk equipment was used. R-Type® pressure variables were taken for both feet, such as mean pressure, contact surface, anterior, posterior, right lateral and left lateral distribution. No significant differences were found in the pre and post test of the baropodometry test with a p> 0.05. Significant correlations were found between the morphological component and the baropodometry with a p <0.05.
Dermatoglifía y su relación con el perfil morfo-funcional en un club de fútbol sala masculino profesional de Bogotá
Authors: Gálvez Pardo Angela Yazmín , Cortés García Anderson David , González Reina Daniel Fabricio , Castro Jiménez Laura Elizabeth , Argüello Gutierrez Yenny Paola , Melo Buitrago Paula Janyn 
Published: August 2021

Una óptima selección deportiva está formada por la valoración del genotipo (dermatoglifía) y el fenotipo (somatotipo, composición corporal y capacidades físicas). El propósito del estudio fue determinar la relación entre la dermatoglifía y el perfil morfo-funcional en deportistas profesionales de futbol sala en la ciudad de Bogotá. La muestra estuvo conformada por 12 hombres, quienes fueron evaluados antropométricamente, con porcentaje graso de 18,4 ± 5,9; masa músculo-esquelética de 32,4 ± 4,4 kg y un somatotipo endo-mesomórfico. Por medio de la dermatoglifía se determinó predominancia en los diseños dactilares presilla (69,2±23,1), D10 (11,3±3,6), SQTL (140,7±95,1). Por último, se valoró la fuerza explosiva con la prueba de Squat Jump, en la cual la posición de poste logró mayor altura. En conclusión, existe una predisposición hacia las capacidades físicas de velocidad, potencia, coordinación y resistencia, además la fuerza explosiva es mayor en deportistas con menor valor en el componente endomórfico y en el porcentaje de masa grasa.
An optimal sports selection is formed by assessment of genotype (dermatoglyph) and phenotype (somatotype, body composition and physical abilities). The purpose of the study was to determine relationship between dermatoglyphics and morpho-functional profile in professional futsal athletes in the city Bogotá. The sample consisted of 12 men, who were anthropometrically evaluated, with a fat % of 18,4 ± 5,9; a musculoskeletal mass of 32,4 ± 4,4 kg and endo-mesomorphic somatotype. Through of dermatoglyphics, predominance was determined in the fingerprint designs L (69,2 ± 23,1), D10 (11,3 ± 3,6), SQTL (140,7 ± 95,1). Finally, explosive force was assessed with the Squat Jump test, in which the post position achieved the greatest height. In conclusion, there is a predisposition towards the physical capacities of speed, power, coordination and resistance, in addition the explosive force is greater in athletes with a lower value in endomorphic component and in percentage of fat mass.
Perfil de los usuarios de centros deportivos según sus expectativas
Authors: Aparicio-Chueca Pilar , Elasri-Ejjaberi Amal , Triadó-Iverm Xavier 
Published: August 2021

Las necesidades de los usuarios de centros deportivos han ido cambiando en los últimos años. Por este motivo se hacen necesarios tanto el análisis del perfil de usuarios como la evaluación de la satisfacción de los clientes y su relación con las expectativas del servicio. Analizado desde la teoría clásica de la desconfirmación de expectativas, el presente estudio tiene como objetivo revisar los perfiles de tres grupos de usuarios en centros deportivos: aquellos para quienes no se cumplen sus expectativas, los que sí las ven satisfechas y aquellos que creen que se han superado. Los datos fueron recogidos mediante una encuesta a usuarios de tres centros deportivos municipales de Barcelona. Un análisis ANOVA revela que la edad es una variable clave, siendo los usuarios jóvenes los que tienen una percepción más positiva de la oferta, mientras que el grupo de usuarios de edad media ven cumplidas sus expectativas en un grado menor. Además, los resultados demuestran que existe un conjunto de usuarios que a pesar de haber manifestado que el centro no cumple con sus expectativas, siguen como abonados en el mismo, contradiciendo la teoría de la desconfirmación de expectativas. Se exponen, finalmente, un conjunto de aplicaciones prácticas dirigidas al análisis y la gestión de las expectativas de los usuarios y el establecimiento de políticas de permanencia.
The needs from users of sports centers have been changing in recent years. For this reason, it is necessary to analyse users’ profile and its relationship with service expectations. Analysed from the classical theory of disconfirmation of expectations, the present study aims to review the profiles of three user groups in sports centers: those for whom their expectations are not met, those who seems satisfied and those who believe that they have been overcome with the service. The data was collected through a survey of users of three municipal sports centers in Barcelona. An ANOVA analysis reveals that age is a key variable, with young users having a more positive perception of the offer, while the group of middle-aged users seems fulfil their expectations in a lesser degree. In addition, the results show that there is a set of users who despite having stated that the center does not meet their expectations, continue as subscribers in it, contradicting the theory of disconfirmation of expectations. Finally, a set of practical applications aimed at the analysis, and management, of user expectations. Also, some fidelity policies are exposed.
Qualitative Traits of Dry Rose Flowers ‘Taj Mahal’ as Influenced by Dehydration Methods
Authors: Narjinary M. , Khan Arpita Mandal , Maitra S. , Sarkar I. , Pal P. K. 
Published: August 2021

Aims: To optimize drying technique for the popular Dutch rose cultivar, Taj Mahal, by evaluating different drying methods and appraising the physical, biochemical and sensory quality of the product.
Study Design: Completely Randomized Design.
Place and Duration of Study: Department of Floriculture, Medicinal and Aromatic Plants, Faculty of Horticulture, Uttar Banga Krishi Viswavidyalaya, during 2019-2020
Methodology: Flowers of rose cultivar ‘Taj Mahal’, at their prime beauty i.e., half-opened bud stage, were subjected to embedded drying in silica gel at six different conditions viz. at room temperature (T1), in hot air oven at 45°C, (T2) and at 60°C, (T3) in micro-wave oven at 100% power level (T4), 80% power level (T5) and at 60% power level (T6). The quality of the ensuing dehydrated flowers was judged with respect to colour, weight, volume shrinkage and anthocyanin and carotenoid contents. Temperature during drying and time to reach optimum dehydrated condition under different drying techniques were recorded. Sensory evaluation for the quality of the products was done after six months of storage.
Results: The time taken for optimum drying ranged from 120 hours in case of room temperature drying (25.1°C) to 3 minutes in microwave oven on high power i.e., 100% (130.4°C). Significant variation in final weight of the product was recorded between 18.34% to 28% of the fresh weight. Minimum shrinkage (42.85%) was noted in room drying (T1) and hot air oven drying at 60°C (43.53%). Maximum anthocyanin concentration (3.528 mg/g) was recorded in flowers dried at room temperature, whereas, minimum among the dried flowers, was recorded in microwave oven drying at 100% power level (1.439 mg/g). Maximum Carotenoid content (16.780 µg/g) was recorded in flowers dried in hot air oven at 45°C. Out of six treatments in the present study, maximum sensory score (30.38 out of 36) was gathered by T2, which was at par with T1 and T5.
Conclusion: Dehydrating ‘Taj Mahal’ rose flowers by embedding in silica gel and drying under room temperature (25°C) for 120 hours or hot air oven at 45°C for 27.5 hours or microwave oven at 80% power level for 3.5 minutes can be recommended for commercial dry flower production.
Antibiotic Resistance Patterns of Escherichia coli Detected in Pig Faecal Samples from Anambra State
Authors: Kyrian-Ogbonna E. A. , Ekwealor I. A. , Eze E. N. , Eluba R. A. , Nworji E. C. , Ogah E. C. , Oladejo A. A. 
Published: August 2021

Aim: Pig farmers use antibiotics for therapeutic, metaphylaxis, prophylaxis and growth promotion in their farm animals. This work was aimed to determine the antibiogram of Escherichia coli isolated from pig faecal samples from pig farms in the three senatorial zones of Anambra State.
Materials and Methods: A total of 80 faecal samples were collected from forty pig farms in the three senatorial zones (Anambra North, Anambra Central and Anambra South) of Anambra State from February, 2018-January, 2019 and analyzed microbiologically using MacConkey agar and Eosin Methylene Blue (EMB) Agar and appropriate culture conditions. Recovered isolates were further characterized based on their morphological and biochemical features. Antimicrobial susceptibility of the isolates was tested to 10 conventional antibiotics using Kirby Bauer Disc Diffusion method.
Results: A total of 140 Escherichia coli isolates were recovered and characterized. Percentage occurrences were 36.4, 30.1 and 33.5 in Anambra North, Anambra Central and Anambra South respectively. Antimicrobial susceptibility testing of the bacterial isolates revealed that resistance of the isolates ranged from 7% resistance to Imipenem to 67% resistance to Streptomycin. A one way analysis of variance showed no significant difference (p >0.05) in resistance to imipenem, amoxicillin/clavulanic, ceftazidime, tetracycline, gentamicin, ceftriaxone, ciprofloxacin, trimethoprim/sulfamethoxazol and significant difference (p < 0.05) in resistance to streptomycin and cefotaxime in the three senatorial zones studied. 51.4% of the isolates were multidrug resistant.
Conclusion and Recommendation: Misuse and overuse of antibiotics in piggery have resulted in antibiotic resistance in isolates from pig faecal samples. Policies regarding prudent use of antibiotics in pig farms should be enforced to reduce the spread of antibiotic resistance.
In Situ Synthesis of Molybdenum Carbide Nanoparticles Incorporated into Laser‐Patterned Nitrogen‐Doped Carbon for Room Temperature VOC Sensing
Authors: Wang Huize , Delacroix Simon , Zieleniewska Anna , Hou Jing , Tarakina Nadezda V. , Cruz Daniel , Lauermann Iver , Ferguson Andrew J. , Blackburn Jeffrey L. , Strauss Volker 
Published: August 2021

AbstractCarbon laser‐patterning (CLaP) is emerging as a new tool for the precise and selective synthesis of functional carbon‐based materials for on‐chip applications. The aim of this work is to demonstrate the applicability of laser‐patterned nitrogen‐doped carbon (LP‐NC) for resistive gas‐sensing applications. Films of pre‐carbonized organic nanoparticles on polyethylenetherephthalate are carbonized with a CO2‐laser. Upon laser‐irradiation a compositional and morphological gradient in the films is generated with a carbon content of 92% near the top surface. The specific surface areas of the LP‐NC are increased by introducing sodium iodide (NaI) as a porogen. Electronic conductivity and surface area measurements corroborate the deeper penetration of the laser‐energy into the film in the presence of NaI. Furthermore, impregnation of LP‐NC with MoC1−x (<10 nm) nanoparticles is achieved by addition of ammonium heptamolybdate into the precursor film. The resulting doping‐sensitive nano‐grain boundaries between p‐type carbon and metallic MoC1−x lead to an improvement of the volatile organic compounds sensing response of ΔR/R0 = −3.7% or −0.8% for 1250 ppm acetone or 900 ppm toluene at room temperature, respectively, which is competitive with carbon‐based sensor materials. Further advances in sensitivity and in situ functionalization are expected to make CLaP a useful method for printing selective sensor arrays.
Combined Bulk and Surface Passivation in Dimensionally Engineered 2D‐3D Perovskite Films via Chlorine Diffusion
Authors: Mahmud Md Arafat , Pham Huyen T. , Duong The , Yin Yanting , Peng Jun , Wu Yiliang , Liang Wensheng , Li Li , Kumar Anand , Shen Heping , Walter Daniel , Nguyen Hieu T. , Mozaffari Naeimeh , Tabi Grace Dansoa , Andersson Gunther , Catchpole Kylie R. , Weber Klaus J. , White Thomas P. 
Published: August 2021

AbstractDimensional engineering of perovskite films is a promising pathway to improve the efficiency and stability of perovskite solar cells (PSCs). In this context, surface or bulk passivation of defects in 3D perovskite film by careful introduction of 2D perovskite plays a key role. Here the authors demonstrate a 2D perovskite passivation scheme based on octylammonium chloride, and show that it provides both bulk and surface passivation of 1.6 eV bandgap 3D perovskite film for highly efficient (≈23.62%) PSCs with open‐circuit voltages up to 1.24 V. Surface and depth‐resolved microscopy and spectroscopy analysis reveal that the Cl− anion diffuses into the perovskite bulk, passivating defects, while the octylammonium ligands provide effective, localized surface passivation. The authors find that the Cl− diffusion into the perovskite lattice is independent of the 2D perovskite crystallization process and occurs rapidly during deposition of the 2D precursor solution. The annealing‐induced evaporation of Cl from bulk perovskite is also inhibited in 2D–3D perovskite film as compared to pristine 3D perovskite, ensuring effective bulk passivation in the relevant film.
Minimizing Optical Energy Losses for Long‐Lifetime Perovskite Light‐Emitting Diodes
Authors: Ye Yong‐Chun , Li Yan‐Qing , Cai Xiao‐Yi , Zhou Wei , Shen Yang , Shen Kong‐Chao , Wang Jing‐Kun , Gao Xingyu , Zhidkov Ivan S. , Tang Jian‐Xin 
Published: August 2021

AbstractRegardless of the rapid advance on perovskite light‐emitting diodes (PeLEDs), the lack of long‐term operational stability hinders the practicality of this technology. Particularly, thermal management is indispensable to control the Joule heating induced by charge transport and parasitic re‐absorption of internally confined photons. Herein, a synergetic device architecture is proposed for minimizing the optical energy losses in PeLEDs toward high efficiency and long lifetime. By adopting a carefully modified perovskite emitter in combination with an improved light outcoupling structure, red PeLEDs emitting at 666 nm achieve a peak external quantum efficiency of 21.2% and an operational half‐lifetime of 4806.7 h for an initial luminance of 100 cd m‐2. The enhanced light extraction from trapped modes can efficiently reduce the driving current and suppress optical energy losses in PeLEDs, which in turn ameliorate the heat‐induced device degradation during operation. This work paves the way toward high‐performance PeLEDs for display and lighting applications in the future.
Multifunctional Hybrid Hydrogel Enhanced Antitumor Therapy through Multiple Destroying DNA Functions by a Triple‐Combination Synergistic Therapy
Authors: Zhang Jiamin , Yang Lijun , Huang Fan , Zhao Cuicui , Liu Jinjian , Zhang Yumin , Liu Jianfeng 
Published: August 2021

AbstractBrachytherapy, as an effective setting for precise cancer therapy in clinic, can lead to serious DNA damage. However, its therapeutic efficacy is always limited by the DNA self‐repair property, tumor hypoxia‐associated radiation resistance as well as inhomogeneous distribution of the radioactive material. Herein, a multifunctional hybrid hydrogel (131I‐hydrogel/DOX/GNPs aggregates) is developed by loading gold nanoparticle aggregates (GNPs aggregates) and DOX into a radionuclide iodine‐131 (131I) labelled polymeric hydrogels (131I‐PEG‐P(Tyr)8) for tumor destruction by completely damaging DNA self‐repair functions. This hybrid hydrogel exhibits excellent photothermal/radiolabel stability, biocompatibility, and fluorescence/photothermal /SPECT imaging properties. After local injection, the sustained releasing DOX within tumor greatly inhibits the DNA replication. Meanwhile, GNPs aggregates as a radiosensitizer and photosensitizer show a significant improvement of brachytherapeutic efficacy and cause serious DNA damage. Simultaneously, GNPs aggregates induce mild photothermal therapy under 808 nm laser irradiation, which not only inhibits self‐repair of the damaged DNA but also effectively relieves tumor hypoxic condition to enhance the therapeutic effects of brachytherapy, leading to a triple‐synergistic destruction of DNA functions. Therefore, this study provides a highly efficient tumor synergistic therapy platform and insight into the synergistic antitumor mechanism in DNA level.
Nutrient management for sustainable food crop intensification in African tropical savannas
Authors: Wortmann Charles S. , Stewart Zachary 
Published: August 2021

AbstractIncreased fertilizer use is often an essential component of sustainable intensification for improved food security and economic growth in the upper elevation tropical savanna (UTS) and lower elevation tropical savanna (LTS) of Africa. The UTS and LTS are large “breadbasket” areas with little fertilizer use due to financial and other constraints. Farmers’ perceptions of high profit opportunity with low risk are often major drivers of adoption. Representative crop nutrient response functions are needed to maximize farm‐level profits from fertilizer use. Such functions were determined from results of past research, and profit potentials were evaluated. The mean yield increases due to fertilizer application at the economically optimum rate, relative to yield with no fertilizer applied, were as follows: 41% for cassava (Manihot esculenta Crantz), 18% for cowpea [Vigna unguiculata (L.) Walp.], 16% for groundnut (Arachis hypogaea L.), 67% for maize (Zea mays L.), 50% for lowland rice (Oryza sativa L.), and 39% for sorghum [Sorghum bicolor (L.) Moench] in LTS, and 46% for bean (Phaseolus vulgaris L.), 81% for groundnut, 58% for maize, 96% for upland rice (Oryza sativa L. or Oryza glaberrima Steud.), 32% for sorghum, and 48% for soybean [Glycine max (L.) Merr.] in UTS. The profit potential varied greatly across nutrient rates applied to individual crops making optimized crop–nutrient–rate choices especially important for cases of financially constrained fertilizer use. Considerations for achieving widespread adoption of increased fertilizer use are discussed. Increased fertilizer use needs to be complemented by mitigation of diverse yield and socioeconomic constraints to meet the growing demand for food.