Design Optimization of the Aeronautical Sheet Hydroforming Process Using the Taguchi Method

The aluminium alloy sheet forming processes forging in rubber pad and diaphragm presses (also known as hydroforming processes) are simple and economical processes adapted to aeronautical production. Typical defects of these processes are elastic recovery, necking, and wrinkling, and they present di culties in control mainly due to property variations of the sheet material that take place during the process. In order to make these processes robust and unresponsive to material variations, a multiobjective optimization methodology based on the Taguchi method is proposed in the present study. The design of experiments and process simulation are combined in the methodology, using the nonlinear finite element method. The properties of sheet material are considered noise factors of the hydroforming process, the objective being to find a combination of the control factors that causes minimal defects to noise factors. The methodology was applied to an AA2024-T3 aluminium alloy sheet of 1 mm thickness stamping process in a diaphragm press. The results allowed us to establish the optimal pressure values, friction coeficient between sheet and block, and friction coeficient between sheet and rubber to reduce the elastic recovery variations and the minimal thickness before noise facts

Application of Ligilactobacillus salivarius CECT5713 to Achieve Term Pregnancies in Women with Repetitive Abortion or Infertility of Unknown Origin by Microbiological and Immunological Modulation of the Vaginal Ecosystem

In this study, the cervicovaginal environment of women with reproductive failure (repetitive abortion, infertility of unknown origin) was assessed and compared to that of healthy fertile women. Subsequently, the ability of Ligilactobacillus salivarius CECT5713 to increase pregnancy rates in women with reproductive failure was evaluated. Vaginal pH and Nugent score were higher in women with reproductive failure than in fertile women. The opposite was observed regarding the immune factors TGF-β 1, TFG-β 2, and VEFG. Lactobacilli were detected at a higher frequency and concentration in fertile women than in women with repetitive abortion or infertility. The metataxonomic study revealed that vaginal samples from fertile women were characterized by the high abundance of Lactobacillus sequences, while DNA from this genus was practically absent in one third of samples from women with reproductive failure. Daily oral administration of L. salivarius CECT5713 (~9 log10 CFU/day) to women with reproductive failure for a maximum of 6 months resulted in an overall successful pregnancy rate of 56%. The probiotic intervention modified key microbiological, biochemical, and immunological parameters in women who got pregnant. In conclusion, L. salivarius CECT5713 has proved to be a good candidate to improve reproductive success in women with reproductive failure.Sección Deptal. de Farmacia Galénica y Tecnología Alimentaria (Veterinaria)Fac. de VeterinariaTRUEContract 291-2018 established between Complutense University of Madrid and Biosearch Life S. A. (Granada, Spain)Irma Castro is the recipient of a predoctoral contract (BES-2017-080713) from the Ministerio de Ciencia, Innovación y Universidades (Spain)pu

Presence of women on the editorial boards of the language and linguistics journals in Spain

Many international studies have pointed out the under-representation of women on Editorial Boards of both Science and Social Science journals. Their presence as Editorial Board members is relevant as they influence and reflect the policies of the journal itself. This study analyses the participation of women on the Editorial Boards of the Spanish Language and Linguistics journals in SCOPUS. To this end, 54 journals indexed in SCOPUS were analysed, thus discriminating the gender of all members and the role that each member plays on the Editorial Board. The results show no significant differences in the participation of men and women in these Editorial Boards. It was not found any evidence of gender bias in these journals

Numerical Analysis of Bicycle Helmet under Blunt Behavior

This study evaluates various safety aspects of standardized impacts that cyclists may suffer while wearing a bicycle helmet, by combining a partially validated finite element model of the cranio-cervical region and a newly developed commercial bicycle helmet model. Under EN 1078 standardized impact conditions, the results of simulated impact tests show that the helmet can absorb 40% to 50% of the total impact energy at impact velocities above 4 m/s. Further, based on a relationship between the head injury criterion and the risk of injury from field data, the results of the simulations suggest that minor injuries may occur at impact velocities of 10 km/h, serious injuries at 15 km/h, and severe injuries at 20 km/h. Fatal injuries will likely occur at impact velocities of 30 km/h and higher.This work has been carried out within the framework of the research project DPI2017-88166- of FEDER program financed by the Ministerio de Economía, Industria y Competitividad and the Spanish Ministry of Education, Culture and Sports for the professor’s mobility program José Castillejo’s 2018 grant (CAS18/00292)

Quality Control of the Thermal Properties of Superstructures in Accommodation Spaces in Naval Constructions

The application of passive design strategies in ships, such as the use of superstructures with high thermal insulation, allows the energy demand of heating, ventilation, and air conditioning systems to be reduced. There is a knowledge gap in the scientific literature on the possibilities to thermally characterize superstructures. Knowing such possibilities would make a methodology available for the quality control of naval constructions and for the inspection of the appropriate state of insulations in existing ships. For this purpose, a total of three different typologies of ship superstructures were monitored, and the data obtained were analyzed by using various existing approaches for the thermal characterization of facades: the heat flow meter method and temperature measurement methods. The results showed that the heat flow meter method constitutes a valid methodology to obtain representative results. In addition, guaranteeing a thermal gradient dependent of the wall typology and placing probes in zones not influenced by thermal bridges ensure that representative results are achieved

Modelo Integrador de Mindfulness (MIM): el cultivo de los estados mentales positivos hacia uno mismo y los demás a través del mindfulness y la autocompasión

Reconocimiento-No comercialCada vez son más los estudios que muestran la eficacia de las Intervenciones Basadas en Mindfulness (MBIs) para el cultivo del bienestar. Sin embargo, son escasos los estudios que indagan en los mecanismos que explican su funcionamiento. El objetivo del presente estudio es presentar y validar el Modelo Integrador de Mindfulness (MIM), que plantea como principal hipótesis que los incrementos en mindfulness rasgo mediante la práctica de la meditación mindfulness lleva a incrementos en autocompasión, y éstos, a su vez, dirigen al incremento de los estados mentales positivos hacia los demás y hacia uno mismo. Se diseñó una MBI de práctica intensiva de tres semanas de duración con grupo control no aleatorizado. Para el análisis se dividió a la muestra en función de la experiencia previa en meditación. Los resultados muestran tamaños del efecto grandes para el efecto de la MBI sobre mindfulness rasgo, autocompasión y los estados mentales positivos hacia uno mismo y hacia los demás. Los datos respaldan a su vez el MIM, indicando que la práctica de la meditación mindfulness lleva al cultivo de mindfulness y autocompasión secuencialmente, lo que posteriormente parece llevar al desarrollo de estados mentales positivos hacia los demás y hacia uno mismoThere are more and more studies showing the effectiveness of Mindfulness-based interventions (MBI) in well-being. However, there are few studies that explore the mechanisms underlying this effect. The aim of this study is to present and validate the Integrative Model of Mindfulness (MIM). MIM main hypothesis is that mindfulness practice leads to an increment in mindfulness trait, which leads to an increase of self-compassion, and these in turn, lead to increase positive mental states to-wards others and oneself. A MBI intensive three-week with non-randomized controlled group was designed. Participants (N = 87) were dif-ferentiated by meditation experience as well. The results show large effect sizes regarding the effect of MBI on mindfulness trait, self-compassion and positive mental states to oneself and to others. The data support the MIM, indicating that the practice of mindfulness meditation leads in a sequentially way to the cultivation of mindfulness and self-compassion, which subse-quently appears to lead to the development of positive mental states to-wards others and onesel

Papel de la inflamación y la adhesión leucocitaria en la fisiopatología del daño orgánico en la hipertensión arterial.

La hipertensión arterial aumenta el estrés oxidativo, el cual a su vez impide una adecuada función endotelial. La disfunción endotelial es común en los pacientes hipertensos; se asocia con inflamación, incremento de algunos mediadores de la inflamación y daño a órgano blanco. En presencia de disfunción endotelial, se expresan en el endotelio vascular moléculas de adhesión, las cuales facilitan el rodamiento de los leucocitos (especialmente monocitos) sobre la pared arterial, así como su paso al espacio subendotelial. Estas moléculas se han asociado con algunas complicaciones de la hipertensión arterial. Se ha identificado un posible nexo entre inflamación e hipertensión arterial, y recientemente se ha destacado el papel de la inflamación en el desarrollo de las complicaciones cardiovasculares de la enfermedad, en este escrito revisaremos los mecanismos que contribuyen a ese nexo, así como el papel de la inflamación en el desarrollo de complicaciones en el paciente hipertenso

Research in Mathematics Education within the Emerging Sources Citation Index (ESCI): Colombian production

El conocimiento de los patrones de producción científica de todo campo del conocimiento es parte de la dinámica de la ciencia. Se presenta un estudio bibliométrico sobre la producción científica realizada en Colombia sobre educación matemática y que se halla indexada en la base de datos Emerging Sources Citation Index. Se halló un alto grado de colaboración en la autoría y el establecimiento de redes de colaboración interinstitucional de carácter nacional e internacional. La producción se ha visto incrementada en los últimos años, pero sigue siendo baja y su difusión es de marcado carácter local.Knowledge of scientific production patterns in every field of knowledge is part of the dynamics of science itself. A bibliometric study on the Colombian scientific production in Mathematics Education and its indexation within the Emerging Source Citation Index database is presented. A high degree of collaboration was found in the authorship and the establishment of inter-institutional collaboration networks of national and international nature. Production has increased in recent years, but it remains low and its dissemination is markedly local

Parallel proccessing applied to object detection with a Jetson TX2 embedded system.

Video streams from panoramic cameras represent a powerful tool for automated surveillance systems, but naïve implementations typically require very intensive computational loads for applying deep learning models for automated detection and tracking of objects of interest, since these models require relatively high resolution to reliably perform object detection. In this paper, we report a host of improvements to our previous state-of-the-art software system to reliably detect and track objects in video streams from panoramic cameras, resulting in an increase in the processing framerate in a Jetson TX2 board, with respect to our previous results. Depending on the number of processes and the load profile, we observe up to a five-fold increase in the framerate.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Self-triggered sampling selection based on quadratic programming

This paper proposes a model-based control strategy for networked control systems subject to norm bounded disturbances. The communication channel is supposed to be shared with several processes and, therefore, the access to the network needs to be minimized to avoid collisions and packet losses. We propose to use a variable sample rate scheme in which the controller operates in open-loop between successive state measurements. The sampling time is decided on-line solving a sequence of quadratic optimization problems in order to minimize the access to the common network while guaranteeing closed-loop practical stability. Both discrete and continuous time schemes are considered