The formation of the archaeological site of Huelva. Natural processes and human activity

Como alternativa a las interpretaciones realizadas en décadas anteriores, se explica desde planteamientos geoarqueológicos la conformación del sitio arqueológico de Huelva, resaltando la interrelación de los procesos naturales y antrópicos a lo largo del tiempo. Como ejemplo se incide en la explicación del relleno de una de las vaguadas existentes entre los cabezos de San Pedro y del Cementerio Viejo, en la conformación de la estratigrafía posdeposicional del Área Tres del Cabezo de la Esperanza, y en la localización y conformación del reborde de la llanura mareal bajo la actual calle Méndez Núñez en una fase de la Protohistoria.As a geoarchaeological alternative to last decades explications of the archaeological excavations carried out in the site of Huelva, the interconnections of natural and antropogenic processes are used to explicate the archaeological data. As working examples, the infill of Cabezo de San Pedro and Cabezo del Cementerio Viejo small palaeovalley, a postdeposicional stratigrafy in Cabezo de la Esperanza Área Tres, and the protohistorical tidal flat archaeological data under Méndez Núñez street are hereby presented.España. Ministerio de Ciencia y Tecnología HUM 2004-0179

Comparison of a proprioceptive training program on stable base and unstable base

The aim is to compare two proprioceptive training programs on a stable (G1) and an unstable (G2) base in terms of balance and stability. During a 5 week period, 18 professional football players underwent a proprioceptive training program, 9 in G1 and the other 9 in G2. The Standard Excursion Balance Test was applied before and after the intervention program. Significant intragroup differences were found in the variables LEFT FRONT, ANTEROLATERAL LEFT (ANTLAT.LEFT), BACK RIGHT and ANTEROMEDIAL RIGHT (ANTMED.RIGHT) (p<0,005) for the G1, and FRONT RIGHT, FRONT LEFT, POSTMED.RIGHT, POSTMED.LEFT and MED.RIGHT (p <0,005) for G2. We conclude that there are no significant differences between the unstable base training and training stable base regarding improvement in balance and stability.Actividad Física y Deport

Quantum metrology at the Heisenberg limit with ion traps

Sub-Planck phase-space structures in the Wigner function of the motional degree of freedom of a trapped ion can be used to perform weak force measurements with Heisenberg-limited sensitivity. We propose methods to engineer the Hamiltonian of the trapped ion to generate states with such small scale structures, and we show how to use them in quantum metrology applications.Comment: 10 pages, 6 figure

1,2-Dimeth­oxy-4-methyl-3-[(S)-p-tolyl­sulfin­yl]benzene

In the title compound, C16H18O3S, the dihedral angle between the benzene rings is 75.48 (8)°. The absolute configuration at the stereogenic S-atom center was determined as S. The crystal structure is stabilized by inter­molecular C—H⋯O contacts

Current Developments in Antioxidant Therapies for Spinal Cord Injury

When spinal cord injury (SCI) occurs, numerous sources of reactive oxygen species and nitrogen species may be active within first minutes or hours and even reactivate few days later. Free radical formation and lipid peroxidation (LP) have been described as an important mechanism in the beginning and accelerated progress in the development of diverse pathologies, importantly in those related to central nervous system. The compromise of molecules and cellular structures due to the oxidative state of microenvironment in SCI may determinate survival or apoptosis of resident and infiltrating cells and polarization toward an inflammatory response, which lead to an extension of damaged tissue and loss of neuronal function, or a regulatory/regenerative response. The investigation of new antioxidant agents and their action at a molecular level begins to reveal mechanisms that, if correctly modulated, promise an improvement in recovery of functions with respect to conventional pharmacological therapies. In this chapter, we will review the general mechanisms of oxidative stress and lipid peroxidation, those antioxidant treatments in experimental development and clinical phase, as well as their achievements and limitations

Comparison of the effect of repeated-sprint training combined with two different methods of strengt training on young soccer players

Comparison of the effect of repeated-sprint training combined with two different methods of strength training on young soccer players. J Strength Cond Res 29(3): 744–751, 2015—The aim of this study was to assess the effect of combining repeated-sprint training with 2 different methods of muscle strength training on physical performance variables in young players. Twenty-one soccer players with mean (±SD) age of 18.1 (±0.8) years, weight 69.9 (±6.5) kg, and height 177.1 (±5.7) cm, and competing in U-19 category, were randomly assigned to 2 experimental groups: squat group (SG: n = 10) and take-off group (TG: n = 11). Intervention in both groups consisted of the combination of a weekly session of repeated-sprint training (the same for both groups), with 2 weekly sessions of strength training (different for each group), for 8 weeks in the final period of the season. The strength sessions for the SG consisted of conducting a series of full squats executed at maximum velocity in the concentric phase. Intervention in the TG was the performance of 2 specific strength exercises (take-offs and change of direction), with measurements taken before and after consideration of the following variables: repeated-sprint ability (RSA), yo-yo intermittent recovery test level 1 (YYIRT1), countermovement jump (CMJ), and average velocity in full squat progressive loads test. The SG improved CMJ height in 5.28% (p <= 0.05) and FS37.5-47.5-67.5 (p <= 0.05), whereas the TG improved FS17.5-27.5-37.5-47.5-67.5 (p <= 0.05). There were no significant changes in the values of RSA or YYIRT1 in either group. The results seem to show that the combination of a weekly session of repeated-sprint training with 2 weekly sessions of strength training could be an insufficient stimulus to improve RSA in the final period of the season.Actividad Física y Deport

A bright bolide produced by a meteoroid follwing a Jupiter family comet orbit

One of the techniques employed by the SPanish Meteor Network (SPMN) to monitor the night sky is based on high-sensitivity CCD video de- vices. These have a limiting magnitude of +3/+4 with- out using any image intensifier. Our meteor network has increased the number of such video stations from 2 in 2006 to 25 in 2011. Nowadays we perform a con- tinuous monitoring of meteor and fireball activity over Spain and neighbouring regions, which is equivalent to an area of about 500.000 km 2 . This expansion is being accompanied by a considerable effort to develop sev- eral software packages to accomplish different tasks, such as the automated operation of some of our sta- tions and the data reduction of the huge amount of information these provide. Besides, favourable weather conditions in Spain combined with the high sensitivity of our systems give us an advantage to per- form this continuous monitoring, which has provided important information about meteor and fireball activ- ity. The analysis of bolides is, in fact, one of our pri- orities, as brighter ones can be potential meteorite pro- ducing events and fireballs also may provide useful information about disruption episodes in their parent objects. In this context, we have imaged on April 27, 2011 a double-station sporadic fireball with an abso- lute magnitude of about -7 ± 1. The analysis of this bo- lide is made here

A northerm may ophiuchid fireball imaged in 2012 in the framework of the Spanish meteor network

The Northern May Ophiuchids is a poorly known annual meteor shower whose activity period extends from April, 25 to May, 31, peaking around May 13 [1]. It is included in the IAU list of working meteor showers with code 149 NOP. Thus, the development of a continuous observing campaign can provide helpful data to increase or knowledge about this shower. In particular, multi-station events would be useful to calculate precise orbital data and different physico-chemical properties of meteoroids belonging to the NOP stream. Besides, the chemical nature of these particles of interplanetary matter can be inferred from the analysis of the emission spectrum produced when they ablate in the atmosphere. Here we present the analysis of a NOP fireball recorded in the framework of the fireball monitoring and spectroscopic campaign organized by the SPanish Meteor Network (SPMN)