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OALib Journal期刊

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Cognitive Training in Soccer: Where Is the Key Point?  [PDF]
Matteo Giuriato, Nicola Lovecchio
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104333
Abstract:
Cognitive skills and executive function, in the last years become a golden reference to increase attention social skills and sport success. In particular, soccer is an open skills sport that requires a constant demand of cognitive skills and executive function because the unstable environment defines the decision making. Thus, modern soccer trainer changes the approach avoiding massive conditional exercises and introducing small side games. The purpose of this paper is to investigate what the cognitive training is and what could be an adequate stimulation to improve the executive function in soccer player.
Somatic cell mutations in cerebral tissue of cattle affected by bovine spongiform encephalopathy  [PDF]
Matteo Busconi, Corrado Fogher
Agricultural Sciences (AS) , 2010, DOI: 10.4236/as.2010.11005
Abstract: In animals the prion disease includes sheep and goat scrapie and the bovine spongiform encephalopathy (BSE). While several polymorphisms of the prion (PRNP) gene have been identified in sheep and some of them have been associated with susceptibility to scrapie, few mutations are reported in cattle and no correlation with BSE have been demonstrated. Genetic screening for mutants in the PRNP gene of 21 BSE positive animals by direct sequencing of the amplified gene, using DNA extracted from brain as template, confirmed that only few polymorphisms are present. However DNA molecules cloned and sequenced from the population of fragments considering a total of 90 clones from 9 BSE positive and 70 clones from 7 BSE negative animals, gave a highly significant differences in the frequency of mutations (p = 0.01). The high frequency and type of variants found cannot be explained only with misincorporation error of the Taq polymerase. Interestingly one of the mutations found in the BSE positive animals (F209S) corresponds to a mutant that causes a familiar form of prion disease in humans (F198S). These data can be explained with the presence of somatic mutations modifying the PRNP gene in single brain cells.
Related Party Transactions and Financial Performance: Is There a Correlation? Empirical Evidence from Italian Listed Companies  [PDF]
Matteo Pozzoli, Marco Venuti
Open Journal of Accounting (OJAcct) , 2014, DOI: 10.4236/ojacct.2014.31004
Abstract: Related party transactions (RPTs) can have a dual nature. On one hand, these transactions may be considered sound business exchanges, fulfilling the economic needs of the company. On the other hand, RPTs may be considered a mechanism to exploit company resources as a consequence of existing conflicting interests. This study takes into account both aspects. Specifically, this paper investigates the relation between RPTs and companies’ financial performance, and thus verifies whether there is an association between these kinds of transactions and earnings management. This study examines the existence of this relation as regards the universe of Italian listed companies for the period of 2008-2011. According to the related data analysis, the research concludes that related party transactions and companies’ financial performance results are not correlated and that there is no evidence of a cause-effect relation. Therefore, related party transactions do not appear—thanks also to the existence of control mechanisms—a means used by Italian listed companies to realize earnings management, especially earnings smoothing.
Bruno Migliorini nella cultura del Novecento.
Matteo Santipolo,Matteo Viale
Italiano LinguaDue , 2011, DOI: 10.6092/2037-3597/1251
Abstract: RECENSIONE
Effects of Heliox in Stable COPD Patients at Rest and during Exercise
Matteo Pecchiari
Pulmonary Medicine , 2012, DOI: 10.1155/2012/593985
Abstract: Heliox has been administered to stable chronic obstructive pulmonary disease (COPD) patients at rest and during exercise on the assumption that this low density mixture would have reduced work of breathing, dynamic hyperinflation, and, consequently, dyspnea sensation. Contrary to these expectations, beneficial effects of heliox in these patients at rest have been reported only sporadically, and the majority of the studies performed until now suggests that heliox is not a therapeutic option in spontaneously breathing resting COPD patients. On the other hand, when it is administered to COPD patients exercising at a constant work rate, heliox systematically decreases dyspnea sensation, and, often but not always, increases exercise tolerance. For these reasons, heliox has been evaluated as a non pharmacological tool to power rehabilitation programs. The conflicting results provided by the published trials probably point at a substantial heterogeneity of the COPD patients population in terms of respiratory mechanics and gas exchange. Therefore, further studies, aimed to the identification of mechanisms conditioning the response of exercising COPD patients to heliox, are warranted, before heliox administration, which is costly and cumbersome, can be routinely used in rehabilitation programs. 1. Introduction The clinical use of helium-oxygen mixtures (heliox) in patients with asthma or with larynx or trachea obstruction was first described in 1934 by Barach [1]. From then, the interest in the clinical use of heliox declined, in part because of the discovery of bronchodilators and in part because of the loss of many locations of natural helium during the Second World War [2]. The enthusiasm for heliox resurged in the late 1980s, concomitantly with increased mortality from asthma [3]. At present, the use of heliox has been advocated for a number of conditions, like upper airway obstruction, croup, acute asthma, and postextubation stridor [4]. Heliox has been administered in chronic obstructive pulmonary disease (COPD) patients on the assumption that this gas mixture, because of its low density, is able to reduce pulmonary resistance. It is thus worth to briefly revise the physical properties of heliox and their impact on the dynamics of the respiratory system. 2. Physical Properties of Helium Helium is the lighter element after hydrogen and it heads the noble gas series in the periodic table, with an atomic number of 2 and an atomic weight of 4?g?mol?1. Due to its low melting and boiling point, at ambient temperature and pressure it exists as a gas. Helium is
Amplification of Trial-to-Trial Response Variability by Neurons in Visual Cortex
Matteo Carandini
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.0020264
Abstract: The visual cortex responds to repeated presentations of the same stimulus with high variability. Because the firing mechanism is remarkably noiseless, the source of this variability is thought to lie in the membrane potential fluctuations that result from summated synaptic input. Here this hypothesis is tested through measurements of membrane potential during visual stimulation. Surprisingly, trial-to-trial variability of membrane potential is found to be low. The ratio of variance to mean is much lower for membrane potential than for firing rate. The high variability of firing rate is explained by the threshold present in the function that converts inputs into firing rates. Given an input with small, constant noise, this function produces a firing rate with a large variance that grows with the mean. This model is validated on responses recorded both intracellularly and extracellularly. In neurons of visual cortex, thus, a simple deterministic mechanism amplifies the low variability of summated synaptic inputs into the large variability of firing rate. The computational advantages provided by this amplification are not known.
Using Natural Gradients to Infer a Potential Response to Climate Change: An Example on the Reproductive Performance of Dactylis Glomerata L.
Matteo Dainese
Biology , 2012, DOI: 10.3390/biology1030857
Abstract: An understanding of the climate conditions governing spatial variation in the reproductive performance of plants can provide important information about the factors characterizing plant community structure, especially in the context of climate change. This study focuses on the effect of climate on the sexual reproductive output of Dactylis glomerata L., a perennial grass species widely distributed throughout temperate regions. An indirect space-for-time substitution procedure was used. Sixty mountain populations of the same target species were surveyed along an elevation gradient, and then, a relevant climate model was used to infer a potential response to climate change over time. Within each population, information on the number of stems, seed number and seed mass were collected. Resource investment in reproduction (RIR) was quantified as seed number × seed mass. A clear variation was found in the reproductive performance of D. glomerata along the elevational gradient: RIR improved with increasing temperature. The best model included only one term: the maximum temperature of the warmest month. This study demonstrates that mountain ecosystems offer particularly good opportunities to study climate effects over relatively short distances and suggests that warming will enhance D. glomerata’s reproductive output throughout its elevational range. Furthermore, it can be hypothesized that a potential migration of D. glomerata toward higher altitudes may occur in response to accelerated climate change.
El futuro de la psicoterapia: aprender de los errores
Selvini,Matteo;
Revista de la Asociación Espa?ola de Neuropsiquiatría , 2002, DOI: 10.4321/S0211-57352002000200002
Abstract: in the first part matteo selvini discusses the historical theoretical mistake of family therapy in investigating the "non existing" family of the schizophrenic (or family of the anorexic). it is the theoretical mistake of looking for a lineal link symptom and family. the future is instead that of looking for a complex explanation of a less complex phenomenon loke personality traits. in the second part matteo selvini proposes the first data ot the follow-up of psychotic cases treated by mara selvini palazzoli during the seventies and these data are compared with similar data of anorexia follow-up.
Jet Areas, and What They are Good For
Cacciari, Matteo
High Energy Physics - Phenomenology , 2007,
Abstract: We introduce the concept of the area of a jet, and show how it can be used to perform the subtraction of even a large amount of diffuse noise from hard jets.
pQCD Calculations of Heavy Quark and J/psi Production
Cacciari, Matteo
High Energy Physics - Phenomenology , 2007, DOI: 10.1088/0954-3899/34/8/S37
Abstract: We review the present status of theoretical predictions for both closed (J/psi) and open heavy quark production in high energy collisions, and their comparisons to experimental data.
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