Search results for " play"
showing 10 items of 274 documents
An innovative way to highlight the power of each polymorphism on the elite athletes phenotype expression
2015
The purpose of this study was to determine the probability of soccer players having the best genetic background that could increase performance, evaluating the polymorphism that are considered Performance Enhancing Polymorphism (PEPs) distributed on five genes: PPARα, PPARGC1A, NRF2, ACE e CKMM. Particularly, we investigated how each polymorphism works directly or through another polymorphism to distinguish elite athletes from non-athletic population. Materials And Methods. Sixty professional soccer players (age 22.5 ± 2.2) and sixty healthy volunteers (age 21.2± 2.3) were enrolled. Samples of venous blood was used to prepare genomic DNA. The polymorphic sites were scanned using PCR-RFLP pr…
Association between playing tactics and creating scoring opportunities in elite football. A case study in Spanish Football National Team
2015
The aim of this study was to examine the association between playing tactics, situational variables and creating scoring opportunities according to the type of start-up possession in a case-study. All team possessions (n=857) developed by the Spanish Football national team during the World Cup 2010 were analysed and grouped into “strategic set-plays” (n=90), “recoveries” (n=451) and “restarts” (n=316). Fourteen categorical variables which describe offensive playing tactics, opponent situation as well as situational variables and their associations with creating scoring opportunities were examined using chi-square analysis and bivariate logistic regressions. Chi-square analysis showed that “…
IGUALDADE DE GÊNERO E ANÁLISE DA COMUNICAÇÃO MOTORA NAS TAREFAS DE EDUCAÇÃO FÍSICA
2019
Resumen El presente artículo analiza las tareas motrices propuestas en el ámbito de la Educación Física, tanto por el maestro como en el juego libre, desde una perspectiva de género. A partir de una observación participante se obtienen las tareas propuestas en las sesiones de Educación Física de una escuela en la localidad de Meliana, en la provincia de Valencia (España). Se constatan 134 tareas motrices que se analizan y contextualizan en el marco educativo. Los resultados muestran que se tiende a impulsar un cierto modelo de comportamiento común cuando el docente ejerce mayor directividad. En cambio, cuando el profesor ofrece libertad para escoger, se tienden a reproducir los estereotipos…
Critical behavior in quantum spin chains with composite spin
1989
Composite spin models are constructed such that, by varying two parameters, they interpolate between the spin-(1/2 antiferromagnetic Heisenberg chain and a number of spin-1 models. These include the usual Heisenberg model, the integrable spin-1 model, and the model with an exact valence-bond ground state. Finite-chain calculations are performed on the composite spin model to study its criticality, and to find if the integrable spin-1 model is a multicritical point with a finite gap generated away from it. We find indications for an extended gapless region.
Fast timing and trigger Cherenkov detector for collider experiments
2016
Analysis of fast timing and trigger Cherenkov detector's design for its use in collider experiments is presented. Several specific requirements are taken into account - necessity of the radiator's placement as close to the beam pipe as possible along with the requirement of gapless (solid) radiator's design. Characteristics of the Cherenkov detector's laboratory prototype obtained using a pion beam at the CERN Proton Synchrotron are also presented, showing the possibility of obtaining sufficiently high geometrical efficiency along with good enough time resolution (50 ps sigma).
Antiferromagnetic Topological Insulator with Nonsymmorphic Protection in Two Dimensions
2019
The recent demonstration of topological states in antiferromagnets (AFMs) provides an exciting platform for exploring prominent physical phenomena and applications of antiferromagnetic spintronics. A famous example is the AFM topological insulator (TI) state, which, however, was still not observed in two dimensions. Using a tight-binding model and first-principles calculations, we show that, in contrast to previously observed AFM topological insulators in three dimensions, an AFM TI can emerge in two dimensions as a result of a nonsymmorphic symmetry that combines the twofold rotation symmetry and half-lattice translation. Based on the spin Chern number, Wannier charge centers, and gapless …
Topological Hamiltonian as an exact tool for topological invariants
2012
We propose the concept of `topological Hamiltonian' for topological insulators and superconductors in interacting systems. The eigenvalues of topological Hamiltonian are significantly different from the physical energy spectra, but we show that topological Hamiltonian contains the information of gapless surface states, therefore it is an exact tool for topological invariants.
Mean-Field Game Modeling the Bandwagon Effect with Activation Costs
2015
This paper provides a mean-field game theoretic model of the bandwagon effect in social networks. This effect can be observed whenever individuals tend to align their own opinions to a mainstream opinion. The contribution is threefold. First, we describe the opinion propagation as a mean-field game with local interactions. Second, we establish mean-field equilibrium strategies in the case where the mainstream opinion is constant. Such strategies are shown to have a threshold structure. Third, we extend the use of threshold strategies to the case of time-varying mainstream opinion and study the evolution of the macroscopic system.
Pirkstiņrotaļu loma 3-4 gadus vecu bērnu runas attīstības sekmēšanā
2018
Darba autore: Darja Golubeva Kvalifikācijas darba temats: „Pirkstiņrotaļu loma 3-4 gadus vecu bērnu runas attīstības sekmēšanā” Zinātniskā vadītāja: Baiba Brice Kvalifikācijas darbs izstrādāts ar mērķi teorētiski pētīt un empīriski pamatot pirkstiņrotaļu lomu uz 3-4 gadus vecu bērnu runas attīstības sekmēšanā. Lai sasniegtu minēto mērķi, darba teorētiskajā daļā, balstoties uz jaunākajām zinātniskajām publikācijām un tādu zinātnieku pētījumiem kā B. Brice, G. Svence, L. Berka, M. Koļcova, R. Lalajeva u.c. darba autore sniedz pārskatu par 3-4 gadus vecu bērnu runas attīstību, analizē sīkās motorikas un runas attīstības savstarpējo saikni, kā arī pēta pirkstiņrotaļu būtību un to pielietojumu r…
Does a specific genetic background influence endurance or power-orientated phenotypes?
2012
The purpose of this study was to determine the probability of individuals having the “best” mitochondrial biogenesis related polygenic profile that could increase performance. We compared polygenic profile analyzing several polymorphisms on sixty professional italian soccer players, considered “power-oriented athletes” and thirty sedentary volunteers. Samples of venous blood were obtained by standard clinical procedures and anticoagulant-treated blood was used to prepare genomic DNA. The polymorphic sites were scanned using PCR-RFLP protocols with different enzyme. Furthermore, a cloted part of venus blood sample was used to obtain serum from which we analyzed total cholesterol, high densit…