Search results for "Layers"

Comparison of the standing balance between pole vaulters and soccer players in preseason and postseason

2020

Background and Study Aim: Static is crucial in the maintaining the position of the body’s center of gravity vertically over the base of support. Many sport disciplines require effective balance system. However, the efficiency of the system differs based on the sport discipline. The aim of the study was to examine balance system efficiency in pole vaulters and soccer players. Additionally, the analysis of pre and postseason balance system efficiency was performed in pole vaulters and soccer players as well.
 Material and Methods: To asses static balance system efficiency five pole vaulters and six soccer players were examined. A balance platform was used for open eyes test, close eyes t…

The importance of psychological variables in the perceived exertion of young football players

2017

Las escalas para medir la percepción del esfuerzo están entre los métodos que han sido utilizados para el control y la evaluación de la carga interna del entrenamiento en deportes de equipo como el fútbol. Debido a su naturaleza psicofisiológica, su registro proporciona información proveniente tanto de indicadores fisiológicos como psicológicos del deportista. Dentro del marco de la Teoría de la Autodeterminación (SDT, Self Determination Theory; Deci & Ryan, 1985; Ryan & Deci, 2017) y de la Teoría de las Metas de Logro (AGT, Achievement Goal Theory; Ames, 1992; Nicholls, 1989), en esta tesis doctoral se estudian tanto las variables contextuales desadaptativas (dimensiones del clima motivaci…

Effects of the microbial mineral plugging in the unbound layers of road construction. A mathematical model of simulation of the fatigue phenomenon in…

2008

Influence of a Thiolate Chemical Layer on GaAs (100) Biofunctionalization: An Original Approach Coupling Atomic Force Microscopy and Mass Spectrometr…

2013

International audience; Widely used in microelectronics and optoelectronics; Gallium Arsenide (GaAs) is a III-V crystal with several interesting properties for microsystem and biosensor applications. Among these; its piezoelectric properties and the ability to directly biofunctionalize the bare surface, offer an opportunity to combine a highly sensitive transducer with a specific bio-interface; which are the two essential parts of a biosensor. To optimize the biorecognition part; it is necessary to control protein coverage and the binding affinity of the protein layer on the GaAs surface. In this paper; we investigate the potential of a specific chemical interface composed of thiolate molec…

¿Quién está buscando su mejor versión? Coaching y psicología deportiva en el proceso de terapeutización de (y desde) el golf

2020

This article asks about the expansion of psychological, therapeutic and self-enhancement ethos through the networks and devices that configures middle and upper-middle classes, and about the ways in which this process is singled out starting from the encounter between coaching and psychology paradigms with golf fans, in contemporary Argentina. The empirical materials that support the analysis have been ethnographically produced from the interaction with golf players and coaches.

Sports teams as complex adaptive systems: manipulating player numbers shapes behaviours during football small-sided games

2016

Small-sided and conditioned games (SSCGs) in sport have been modelled as complex adaptive systems. Research has shown that the relative space per player (RSP) formulated in SSCGs can impact on emergent tactical behaviours. In this study we adopted a systems orientation to analyse how different RSP values, obtained through manipulations of player numbers, influenced four measures of interpersonal coordination observed during performance in SSCGs. For this purpose we calculated positional data (GPS 15 Hz) from ten U-15 football players performing in three SSCGs varying in player numbers (3v3, 4v4 and 5v5). Key measures of SSCG system behaviours included values of (1) players’ dispersion, (2) …

Carboxylic derivatives of spin-crossover complexes in switchable materials and surfaces

2022

Los compuestos de transición de espín (SCO, de las siglas en inglés spin-crossover) son un ejemplo perfecto de biestabilidad molecular. La transición entre sus estados de alto y bajo espín (HS y LS, de las siglas en inglés, High Spin y Low Spin, respectivamente) se puede controlar mediante estímulos externos como la temperatura, presión, luz, por nombrar unos pocos. Esto los convierte en compuestos muy interesantes para aplicaciones tales como espintrónica, almacenamiento de memoria y dispositivos conmutables. El interés científico en este tipo de moléculas y la búsqueda de aplicaciones ha ido creciendo a lo largo de los años. Para ello, la deposición de dichos compuestos es el primer paso …

DEEP TISSUE MASSAGE AND FLEXIBILITY IN THE STRUCTURAL COMPONENTS OF THE SUPERFICIAL BACK LINE OF PROFESSIONAL VOLLEYBALL PLAYERS: A PILOT STUDY

2019

Background: Massage is a common treatment in physiotherapy, often used as a prophylaxis or during recovery following a musculoskeletal contusion. One form of therapeutic massage is deep tissue massage (DTM), which has become more popular in recent years as a way of performing targeted work with the myofascial system. Aim of the study: The aim of the study was to examine the effectiveness of deep tissue massage on superficial back line flexibility (hip flexion and knee extension range of motion - ROM). Material and methods: Elite volleyball players (n=15), age: 22.8 ± 4.41 years; mass: 82.67 ± 6.99 kg; height: 1.96 ± 0.08 m) were recruited for this study. Deep tissue massage of the myofascia…

Fear of failing in a competitive achievement setting : the relations between fear of failure, achievement goals and achievement behaviours among adol…

2017

Tutkimme, miten epäonnistumisen pelko on yhteydessä tavoiteorientaatioihin, pitkäjänteisyyteen, panostamiseen ja viihtymiseen teini-ikäisten poikien jalkapalloharrastuksessa. Olimme lisäksi kiinnostuneita siitä, miten yhteneväisiä pelaajien itsearvioinnit ja heidän valmentajiensa arviot olivat pelaajien pitkäjänteisyyteen, panostamiseen ja viihtymiseen liittyen ja vaikuttiko valmennusaika mahdollisiin näkemyseroihin. Epäonnistumisen pelko on tyypillinen haittailmiö kilpailullisessa toiminnassa, se edeltää usein epäedullisten tavoiteorientaatioiden syntymistä ja on yhteydessä viihtymisen vähenemiseen ja harrastuksen lopettamiseen. Tavoiteorientaatiot kertovat tarkempaa tietoa motivaation laa…

Moral Attitudes Predict Cheating and Gamesmanship Behaviors Among Competitive Tennis Players

2017

Background: The present study tested Lee et al.’s (2008) model of moral attitudes and cheating behavior in sports in an Italian sample of young tennis players and extended it to predict behavior in actual match play. In the first phase of the study we proposed that moral, competence and status values would predict prosocial and antisocial moral attitudes directly, and indirectly through athletes’ goal orientations. In the second phase, we hypothesized that moral attitudes would directly predict actual cheating behavior observed during match play.\ud \ud Method: Adolescent competitive tennis players (N = 314, 76.75% males, M age = 14.36 years, SD = 1.50) completed measures of values, goal or…