Imágenes de Latinoamérica en la prensa española. Una aproximación empírica desde la Teoría del Encuadre.

Se presentan los resultados de una investigación de análisis de contenido sobre los encuadres noticiosos de la información publicada en la prensa española sobre Latinoamérica y los latinoamericanos. Dicho estudio forma parte de un proyecto de investigación más amplio sobre el tratamiento informativo de la inmigración. Los resultados obtenidos permiten afirmar que se están aplicando estrategias discursivas que fomentan una cierta correlación ilusoria, al asociar Latinoamérica con acontecimientos y resultados de carácter negativo, observándose diferencias significativas en función del país protagonista de la información. Venezuela y Colombia, en particular, se asocian con temas negativos como los conflictos armados, los sucesos, accidentes y desastres naturales y con encuadres de conflicto e interés humano. Se reflexiona sobre las consecuencias que puede ocasionar una cobertura tan negativa de Latinoamérica (en particular de países que mantienen un alto flujo migratorio con España), en relación al florecimiento de estereotipos y actitudes prejuiciosas

11 Year zooplankton time-series related to North Atlantic climate changes in waters of the Balearic Sea (western Mediterranean)

Workshop I: Climate impact on ecosystem dynamics of marginal and semi-enclosed sea

North Atlantic climate control on plankton variability in the Balearic Sea, western Mediterranean

Publicado

Estilo comportamental al inicio del segundo año de vida:estudio retrospectivo en escolares afectados de trastorno por deficit de atencion e hiperactividad

OBJECTIVES: To study the relationship between behavioural profile of children suffering from Attention Deficit Hyperactivity Disorder (ADHD) and the previous behavioural style of these patients as toddlers. SUBJECTS AND METHODS: We asked the parents of 50 schoolchildren with ADHD, and those of 30 controls, to fill in a Spanish version of the Toddler Behaviour Questionnaire (TBQ) from their retrospective perception of their children's behaviour as toddlers. TBQ items were grouped by factor analysis; t-Student between the scores of both groups and a multiple correlation analysis of TBQ and DSM-IV-ADHD-RS in each of the groups were used. RESULTS: Children in the ADHD group were reported by parents to have had a different toddler behavioural profile in comparison to that of control children (P<0.05). These differences were associated with adapting to new environments, mood, regularity and stability of play behaviour. A correlation was found between behavioural profile in DSM-IV-ADHD- RS and TBQ. CONCLUSIONS: The results of this study should be interpreted with caution. However, they suggest that in the fifth trimester of life a particular behavioural style as regards regularity, stability of play, and mood, could indicate a risk of developing ADHD in the future. This behavioural style should be taken into consideration in rearing and early education prospective studies

Heavy neutrino signals at large hadron colliders

We study the LHC discovery potential for heavy Majorana neutrino singlets in the process pp -> W+ -> l+ N -> l+ l+ jj (l=e,mu) plus its charge conjugate. With a fast detector simulation we show that backgrounds involving two like-sign charged leptons are not negligible and, moreover, they cannot be eliminated with simple sequential kinematical cuts. Using a likelihood analysis it is shown that, for heavy neutrinos coupling only to the muon, LHC has 5 sigma sensitivity for masses up to 200 GeV in the final state mu+- mu+- jj. This reduction in sensitivity, compared to previous parton-level estimates, is driven by the ~ 10^2-10^3 times larger background. Limits are also provided for e+- e+- jj and e+- mu+- jj final states, as well as for Tevatron. For heavy Dirac neutrinos the prospects are worse because backgrounds involving two opposite charge leptons are much larger. For this case, we study the observability of the lepton flavour violating signal e+- mu-+ jj. As a by-product of our analysis, heavy neutrino production has been implemented within the ALPGEN framework.Comment: Latex 36 pages, 49 PS figures. Major extension incorporating analysis for e+- e+-, e+- mu+- and e+- mu-+ final states. Final version to appear in JHE

High temperature internal friction in a Tie46Ale1Moe0.2Si intermetallic, comparison with creep behaviour

Advanced g-TiAl based intermetallics Mo-bearing have been developed to obtain the fine-grained microstructure required for superplastic deformation to be used during further processing. In the present work we have studied an alloy of Tie46.8Ale1Moe0.2Si (at%) with two different microstructures, as-cast material with a coarse grain size above 300 mm, and the hot extruded material exhibiting a grain size smaller than 20 mm. We have used a mechanical spectrometer especially developed for high temperature internal friction measurements to study the defect mobility processes taking place at high temperature. The internal friction spectra at different frequencies has been studied and analyzed up to 1360 K in order to characterize the relaxation processes appearing in this temperature range. A relaxation peak, with a maximum in between 900 K and 1080 K, depending on the oscillating frequency, has been attributed to Ti-atoms diffusion by the stress-induced reorientation of AleVTieAl elastic dipoles. The high temperature background in both microstructural states, as-cast and extruded, has been analyzed, measuring the apparent activation parameters, in particular the apparent energies of Ecast(IF) ¼ 4.4 ± 0.05 eV and Eext(IF) ¼ 4.75 ± 0.05 eV respectively. These results have been compared to those obtained on the same materials by creep deformation. We may conclude that the activation parameters obtained by internal friction analysis, are consistent with the ones measured by creep. Furthermore, the analysis of the high temperature background allows establish the difference on creep resistance for both microstructural states.Peer reviewe

Composición briofítica de los hayedos de Navarra (España)

Se presenta un catálogo de 175 especies de briófitos recolectados en 19 hayedos de Navarra (España). Se establecen comparaciones entre las taxocenosis muscinales propias de cada tipo de hayedo reconocido (Saxifrago hirsutae-Fagetum Br.-BI. 1967, Helleboro-Fagetum O. de Bolos (1948) 1957, Scillo-Fagetum Br.-BI. 1952 em. O. de Bolos 1957 e Isopyro-Fagetum Montserrat 1968). Los porcentajes de elementos corológicos y afinidades ecológicas de la flora muscinal en cada sintaxon difieren entre sí y respecto al conjunto de la brioflora de los hayedos; estas diferencias están en relación con la sinecología de los "Fagetum". Summary: Bryophytic composition of the Fagus sylvatica L. woods in Navarra (Spain). A check-list of 175 species of bryophytes collected over 19 woods of Fagus sylvatica L. in Navarra (Spain) is presented. Comparations between the moss flora of every kind of wood (Saxifrago hirsutae-Fagetum Br.-BI. 1967, Helleboro-Fagetum O. de Bolos (1948) 1957, Scillo-Fagetum Br.-BI. 1952 em. O. de Bolos 1957 and Isopyro-Fagetum Montserrat 1968) are made. The chorologie and ecology composition of the moss flora of every sintaxa is different; differences are related with the sinecology of "Fagetum"

Analysis of Proseds bare-tether performance

NASA's tether experiment ProSEDS will be placed in orbit on board a Delta-II rocket in early 2003. ProSEDS will test bare-tether electron collection, deorbiting of the rocket second stage, and the system dynamic stability. ProSEDS performance will vary both because ambient conditions change along the orbit and because tether-circuit parameters follow a step by step sequence in the current operating cycle. In this work we discuss how measurements of tether current and bias, plasma density, and deorbiting rate can be used to check the OML law for current collection. We review circuit bulk elements; characteristic lengths and energies that determine collection (tether radius, electron thermal gyroradius and Debye length, particle temperatures, tether bias, ion ram energy); and lengths determining current and bias profiles along the tether (extent of magnetic self-field, a length gauging ohmic versus collection impedances, tether length). The analysis serves the purpose of estimating ProSEDS behavior in orbit and fostering our ability for extrapolating ProSEDS flight data to different tether and environmental conditions

Stress-assisted atomic diffusion in metastable austenite D03 phase of Cu-Al-Be shape memory alloys

AbstractCu-Al-based shape memory alloys are firm candidates to be used up to 473K. The main limiting aspect is the activation of diffusion processes in the metastable austenite phase, which drive the alloy decomposition. In the present work the study of short-distance diffusion processes has been approached by internal friction. A relaxation peak has been found in the metastable β (D03) phase of a Cu-Al-Be shape memory alloy, around 500K (at 1Hz), with an activation energy of Ea=1.38±0.05eV. An atomic mechanism of elastic dipoles Antisite-Vacancy reorientation, involving stress-assisted short distance Cu-atoms diffusion, has been proposed

Intra-Abdominal Pressure as a Marker of Enteral Nutrition Intolerance in Critically Ill Patients. The PIANE Study

To determine whether elevated intra-abdominal pressure (IAP) is associated with a higher rate of enteral nutrition-related gastrointestinal (GI) complications; to assess the value of IAP as a predictor of enteral nutrition (EN) intolerance. Intensive Care Unit (ICU) patients on mechanical ventilation requiring at least 5 days of EN were recruited for a prospective, observational, non-interventional, multicenter study. EN was performed and GI complications were managed with an established protocol. IAP was determined via a urinary catheter. Patients who developed any GI complications were considered as presenting EN intolerance. Variables related to EN, IAP and GI complications were monitored daily. Statistical analysis compared patients without GI complications (group A) vs. GI complications (group B). 247 patients were recruited from 28 participating ICUs (group A: 119, group B: 128). No differences between groups were recorded. Patients in group B (p < 0.001) spent more days on EN (8.1 ± 8.4 vs. 18.1 ± 13.7), on mechanical ventilation (8.0 ± 7.7 vs. 19.3 ± 14.9) and in the ICU (12.3 ± 11.4 vs. 24.8 ± 17.5). IAP prior to the GI complication was (14.3 ± 3.1 vs. 15.8 ± 4.8) (p < 0.003). The best IAP value identified for EN intolerance was 14 mmHg but it had low sensitivity and specificity. Although a higher IAP was associated with EN intolerance, IAP alone did not emerge as a good predictor of EN intolerance in critically ill patients