Analysis of adiabatic heating and its influence on the Garofalo equation parameters of a high nitrogen steel

Torsion tests at high temperatures and high strain rates were conducted on a high nitrogen steel (HNS). Under these conditions, adiabatic heating influences its flow behavior. This work focus on a new algorithm for conducting the adiabatic heating correction of stress-strain curves. The algorithm obtains the stress-strain curves at quasiisothermal conditions from those at adiabatic conditions. The corrections in stress obtained can be higher than 15% and increase with increasing strain rates and decreasing temperatures. On the other hand, an upper bound for the temperature rise was found using a dynamic material behavior approach. Finally, the influence of adiabatic heating correction on the Garofalo equation parameters of HNS was analyzed. High values of activation energy and stress exponent were attributed to reinforcement by dispersed carbonitrides and the high amount of alloying elements.The work was carried out through the Projects PBC-05-010-1 from JCCM (Castilla- La Mancha, Spain) and MAT2006-13348 from CICYT. Thanks are given to Prof. E Evangelista for valuable assistance.Peer reviewe

Effect of zinc intake on growth in infants: A meta-analysis

A systematic review and meta-analysis of available randomized controlled trials (RCTs) was conducted to evaluate the effect of zinc (Zn) intake on growth in infants. Out of 5500 studies identified through electronic searches and reference lists, 19 RCTs were selected after applying the exclusion/inclusion criteria. The influence of Zn intake on growth was considered in the overall meta-analysis. Other variables were also taken into account as possible effect modifiers: doses of Zn intake, intervention duration, nutritional status, and risk of bias. From each select growth study, final measures of weight, length, mid upper arm circumference (MUAC), head circumference, weight for age z-score (WAZ), length for age z-score (LAZ), and weight for length z-score (WLZ) were assessed. Pooled β and 95% confidence interval (CI) were calculated. Additionally, we carried out a sensitivity analysis. Zn intake was not associated with weight, length, MUAC, head circumference, and LAZ in the pooled analyses. However, Zn intake had a positive and statistically effect on WAZ (β = 0.06; 95%CI 0.02 to 0.10) and WLZ (β = 0.05; 95%CI 0.01 to 0.08). The dose–response relationship between Zn intake and these parameters indicated that a doubling of Zn intake increased WAZ and WLZ by approximately 4%. Substantial heterogeneity was present only in length analyses (I2 = 45%; p = 0.03). Zn intake was positively associated with length values at short time (four to 20 weeks) (β = 0.01; CI 95% 0 to 0.02) and at medium doses of Zn (4.1 to 8 mg/day) (β = 0.003; CI 95% 0 to 0.01). Nevertheless, the effect magnitude was small. Our results indicate that Zn intake increases growth parameters of infants. Nonetheless, interpretation of these results should be carefully considered

El clima motivacional a les classes d’Educació Física: una aproximació pràctica des de la Teoria de Fites d’Assoliment

Al treball següent es fa una anàlisi dels processos motivacionals que es desenvolupen a les classes d’Educació Física. Prenent com a fonament la Teoria de les Fites d’Assoliment (Nicholls, 1989; Ames, 1992), s’expliquen cada un dels diferents constructes que formen la teoria esmentada (Orientacions, Climes i Implicacions Motivacionals) i la relació entre ells. També s’hi exposen diverses investigacions que han demostrat aquestes relacions, i de quina manera el desenvolupament d’un clima que implica vers la tasca pot millorar i fer més adaptatius els patrons conductuals dels alumnes. Finalment, es fa una proposta metodològica per desenvolupar un clima que impliqui vers la tasca per part del professorat d’Educació Física, amb els beneficis que això reporta

Position paper - progress towards standards in integrated (aerobic) MBR modelling

Membrane bioreactor (MBR) models are useful tools for both design and management. The system complexity is high due to the involved number of processes which can be clustered in biological and physical ones. Literature studies are present and need to be harmonized in order to gain insights from the different studies and allow system optimization by applying a control. This position paper aims at defining the current state of the art of the main integrated MBR models reported in the literature. On the basis of a modelling review, a standardized terminology is proposed to facilitate the further development and comparison of integrated membrane fouling models for aerobic MBRs

Aproximación al estudio del vidrio prerromano: los materiales procedentes de la necrópolis ibérica de El Cigarralejo (Mula, Murcia). Composición química de varias cuentas de collar

For the first time, all the glass materials found in the excavations of the Iberian cemetery of El Cigarralejo (Mula, Murcia) are studied together including those from the published and the unpublished tombs. The small number of glass items in the grave goods found in this Murcian cemetery let us consider them as prestigious adornments, sometimes with prophylactic purposes. As an hypothesis, we can consider that there was a glass workshop near the studied area. The chemical composition of some necklace beads is presented.El texto agrupa por primera vez todos los materiales de vidrio procedentes de las excavaciones de la necrópolis ibérica de El Cigarralejo (Mula, Murcia), tanto de las tumbas publicadas, como inéditas. El escaso número de objetos de vidrio en los ajuares de la necrópolis murciana permite considerarlos como adornos de prestigio y en algún caso con fines profilácticos. Sólo como hipótesis debemos considerar la existencia de un taller cercano al área estudiada. Se presenta la composición química de algunas cuentas de collar

High risk of cardiovascular episodes and low adherence to risk factors guidelines in a population with diabetes

Although recent guidelines cover therapeutic goals, effective lipid management of patients with type 1 and type 2 diabetes to reduce cardiovascular disease (CVD) risk is still largely unattained. In the present study, we explored the electronic health records (EHR) at a specialized diabetes outpatient clinic to assess, in a real world database, the prevalence of poor lipid management in people with diabetes, the associated characteristics of this population, and the patterns of medication.Amge