Study of the nanometric grain size distribution in iron compacts obtained by mechanical milling

Postprint (published version

Generalized S-space-forms

We introduce and study generalized S-space-forms. Moreover, we investigate generalized S-space-forms endowed with an additional structure and we obtain some obstructions for them to be S-manifold

Estudio descriptivo de los hábitos alimenticios y del consumo de alcohol en una muestra de estudiantes de la Universidad de Alicante

Objetivo. Describir la frecuencia de consumo de determinados alimentos y bebidas alcohólicas en una muestra de estudiantes de la Universidad de Alicante. Material y métodos. El instrumento utilizado para la recogida de datos fue un cuestionario de frecuencias de consumo, aplicado mediante entrevista personal a una muestra accidental de 1250 personas, (692 mujeres y 488 hombres), con un rango de edad de 17-40 años. Constaba de cuatro secciones: 1ª) número de comidas y lugar donde se realizan; 2ª) patrones de consumo de los distintos grupos de alimentos; 3ª) patrones de consumo de bebidas alcohólicas, diferenciando lo bebido de lunes a jueves y de viernes a domingo; y 4ª) datos de identificación y demográficos. Resultados. Los datos obtenidos coinciden con los expuestos por otros autores, y muestran que nuestro modelo alimentario se caracteriza por un alto consumo de carnes (=4 veces/semana), adecuada ingesta de huevos (=2,5 v/sem.) e hidratos de carbono complejos (arroz y pastas =4,2 v/sem.), consumo ligeramente inferior al recomendado de frutas (=5,3 v/sem.) e insuficiente de legumbres (=2,2 v:/sem.), verduras y hortalizas frescas (=3,9 v/sem.), y pescados (=2 v/sem.). El consumo de bebidas alcohólicas fue: 2,6 vasos/semana de cerveza, 2,1 v/sem. de combinados, 1,2 v/sem. de licores y 0,8 v/sem. de vino. Los porcentajes de consumidores fueron para la cerveza del 51,1 %, para los combinados del 61,4%, para los licores del 40,9%, y para el vino 18,7%. Los datos señalan que los hombres consumen más bebidas alcohólicas que las mujeres (t=7,79 p<0,001) y que quienes empiezan antes a consumirlas son quienes en mayor cantidad lo hacen (t=-3,17 p<0,001). Conclusiones. Pese a la diferencia existente entre medias de edad y nivel cultural, existe una similitud entre los datos obtenidos en este estudio y el realizado sobre la población de la ciudad de Alicante. Las encuestas alimentarias y de consumo de alcohol realizadas en España son escasas y con diversa metodología, lo que dificulta la comparación de los resultados obtenidos con otros estudios previos

LabVIEW-based control and acquisition system for the dosimetric characterization of a silicon strip detector

Theaimofthisworkistopresentanewdataacquisition,control,andanalysissoftwaresystemwrittenin LabVIEW.Thissystemhasbeendesignedtoobtainthedosimetryofasiliconstripdetectorinpolyethylene. It allows the full automation of the experiments and data analysis required for the dosimetric characterization of silicon detectors. It becomes a useful tool that can be applied in the daily routine check of a beam accelerator.MINECO ICTI2013-2016/FPA2013-47327-C2-1-RMINECO ICTI2013-2016/FPA2014-53290-C2-2- PJunta de Andalucía P12-FQM-160

A 5G mobile network architecture to support vertical industries

The telecom industry is moving from a "horizontal" service delivery model, where services are defined independent of their consumers, toward a "vertical" delivery model, where the provided services are tailored to specific industry sectors and verticals. In order to enable this transition, an end-to-end comprehensive 5G architecture is needed, with capabilities to support the use cases of the different vertical industries. A key feature of this architecture is the implementation of network slicing over a single infrastructure to provision highly heterogeneous vertical services, as well as a network slicing management system capable of handling simultaneous slices. On top of the network slicing technology, functionality needs to be devised to deploy the slices required by the different vertical players and provide them with a suitable interface to manage their slice. In this article, we design a 5G mobile network architecture to support vertical industries. The proposed architecture builds on ongoing standardization efforts at 3GPP and ETSI, and incorporates additional modules to provide enhanced MANO and control functionality as well as artificial-intelligence-based data analytics. On top of these modules, a service layer is provided to offer vertical players an easyto- use interface to manage their services.This work was supported by the H2020 5G-TOURS European project (Grant Agreement No. 856950)

New properties of a bioinspired pyridine benzimidazole compound as a novel differential staining agent for endoplasmic reticulum and Golgi apparatus in fluorescence live cell imaging

Indexación: Scopus.In this study, we explored new properties of the bioinspired pyridine benzimidazole compound B2 (2,4-di-tert-butyl-6-(3H-imidazo[4,5-c]pyridine-2-yl)phenol) regarding its potential use as a differential biomarker. For that, we performed 1D 1HNMR (TOCSY), UV-Vis absorption spectra in different organic solvents, voltammetry profile (including a scan-rate study), and TD-DFT calculations that including NBO analyses, to provide valuable information about B2 structure and luminescence. In our study, we found that the B2 structure is highly stable, where the presence of an intramolecular hydrogen bond (IHB) seems to have a crucial role in the stability of luminescence, and its emission can be assigned as fluorescence. In fact, we found that the relatively large Stokes Shift observed for B2 (around 175 nm) may be attributed to the stability of the B2 geometry and the strength of its IHB. On the other hand, we determined that B2 is biocompatible by cytotoxicity experiments in HeLa cells, an epithelial cell line. Furthermore, in cellular assays we found that B2 could be internalized by passive diffusion in absence of artificial permeabilization at short incubation times (15 min to 30 min). Fluorescence microscopy studies confirmed that B2 accumulates in the endoplasmic reticulum (ER) and Golgi apparatus, two organelles involved in the secretory pathway. Finally, we determined that B2 exhibited no noticeable blinking or bleaching after 1 h of continuous exposure. Thus, B2 provides a biocompatible, rapid, simple, and efficient way to fluorescently label particular organelles, producing similar results to that obtained with other well-established but more complex methods. © 2018 Llancalahuen, Fuentes, Carreño, Zúñiga, Páez-Hernández, Gacitúa, Polanco, Preite, Arratia-Pérez and Otero.https://www.frontiersin.org/articles/10.3389/fchem.2018.00345/ful

Performance of upstream interaction region detectors for the FIRST experiment at GSI

The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at GSI has been designed to study carbon fragmentation, measuring 12C double differential cross sections (∂2σ/ ∂θ∂E) for different beam energies between 100 and 1000 MeV/u. The experimental setup integrates newly designed detectors in the, so called, Interaction Region around the graphite target. The Interaction Region upstream detectors are a 250 μm thick scintillator and a drift chamber optimized for a precise measurement of the ions interaction time and position on the target. In this article we review the design of the upstream detectors along with the preliminary results of the data taking performed on August 2011 with 400 MeV/u fully stripped carbon ion beam at GSI. Detectors performances will be reviewed and compared to those obtained during preliminary tests, performed with 500 MeV electrons (at the BTF facility in the INFN Frascati Laboratories) and 80 MeV/u protons and carbon ions (at the INFN LNS Laboratories in Catania)

Study of the nanometric grain size distribution in iron compacts obtained by mechanical milling

A study has been carried out on the grain size distribution of cylindrical compacts obtained by consolidation of iron powder severely deformed by mechanical milling. Consolidation has been performed in two consecutive steps: cold and hot conditions. The hot one was done at two temperatures, namely 425 and 475ºC. After milling, the iron powder has a grain size of 8 nm (± 4 nm) with an average hardness of 800 HV. After hot compaction the grain size increases up to 50 nm, especially at 475ºC where a small fraction of grains reach larger values than the average. The grain size was evaluated by two different techniques, X-Ray Diffraction and Transmission Electron Microscopy. Results showed some differences between both methods. The advantage of using TEM is that grain size distribution, and not only the average size, can be obtained. Small discs were also obtained from the compacted specimen in order to fracture them on a “ball on three balls” equipment. The fracture behaviour of the samples was then studied by SEM.Postprint (published version

The variability of the serve toss in tennis under the influence of artificial crosswind

This study was made to analyze the variability and stability of the serve toss in tennis, on the x (side-to-side), y (back-to-front) and z (vertical) axes, with 12 experienced players under the influence of crosswind (induced aerodynamic flow) produced by an industrial ventilator. The players were analyzed individually after serving at maximum speed and accuracy to the intersection point of the centre line and service line ("T" point). The results allow us to conclude that the experienced players tend to stabilize the vertical dimension of the service (z axis). Additionally, this study confirms the invariability of the player height ratio: height of impact (1:1.5) in experienced players even when constrained by the "artificial crosswind." Given the above, the vertical dimension of the tennis serve is assumed as a constant feature, which is guaranteed in the remaining varying dimensions (y and x axes) of the ball toss. Thus, the variability should be seen as part of the solution and not as something to be avoided by players and coaches.info:eu-repo/semantics/publishedVersio