El tiro con arco como contexto deportivo para el fomento de la igualdad entre hombres y mujeres

En este trabajo ofrecemos una visión general de la situación deportiva actual desde una perspectiva de género y diferenciando aquellos deportes más técnicos de aquellos otros en los que las capacidades físicas potenciales de los deportistas y las deportistas van a suponer la principal variable de éxito en el rendimiento. Posteriormente, nos centramos en el tiro con arco en particular. Vamos a comentar varios aspectos de este deporte, comenzando por una breve descripción del mismo, resaltando la importancia de los aspectos psicológicos, comentando las diferencias existentes que podemos encontrar en esta práctica deportiva entre hombres y mujeres, así como el caso concreto de las arqueras surcoreanas. Finalmente realizamos algunas propuestas de intervención y mejora hacia la igualdad entre hombres y mujeres en esta modalidad deportiva y sugerimos algunas líneas futuras de investigación desde esta perspectiva de género

Association between vertical and horizontal force-velocity-power profiles in netball players

Netball is a collective sport characterized by intermittent high-intensity actions. Therefore, the players must develop high levels of relative bilateral and unilateral strength and power for both improve performance and also reduce injury risk. The purpose of this study was (i) to provide a reference about the mechanical outputs obtained in the vertical (jumping) and horizontal force-velocity-power (FVP) profile and (ii) observe their relationship, besides the performance in jumping and sprinting in amateur female netball players (age = 24.3 ± 3.2 years, BM = 64.5 ± 5 Kg, height = 172.5 ± 6.2 cm). The variables for both FVP profiles (theoretical maximal force (F0), theoretical maximal velocity (V0) and theoretical maximal power output (Pmax)) were measured with two scientifically validated apps for iOS (My Jump 2 and My Sprint). Our results in regards to the vertical FVP suggest that netball players have low force deficit (36.2 ± 14.6%) and individualized training based on F-V profiling could be beneficial to address their deficit. The moderate correlations found for performance, V0 and Pmax suggest that the improvement in one of the skills (jumping or sprinting) may produce some positive adaptation to the other. However, no association was found in the force production (F0) of the lower limbs for both FVP. Therefore, we recommend that netball players must train specifically ballistic actions in the vertical (jumping) and horizontal direction (sprinting) due to the specificity of both skills and the consequent impact of them on netball performance.Ministry of Economy and Infrastructure of the Junta de Extremadura through the European Regional Development Fund. A way to make Europe. (GR18129)

El perfeccionamiento de los orientadores en ejercicio en el contexto de la reforma: una cuestión pendiente

La formación de los orientadores que actualmente componen los diferentes servicios institucionales de orientación en España es una exigencia de la dinámica de cambio que ha puesto en marcha la Reforma: exigencia desatendida, a excepción del territorio MEC. Las necesidades deformación de los orientadores necesitan ser evaluadas sistemáticamente para vertebrar planes deformación. Una evaluación de estas necesidades ha sido realizada entre los profesionales de la orientación en Andalucía con el objeto de obtener su percepción/valoración sobre la formación inicial que recibieron para la incorporación al puesto de trabajo, sus ámbitos de carencias formativas, los intereses deformación específicos del colectivo y la viabilidad de una colaboración con la Universidad en un plan deformación. Los resultados de la investigación presentan una situación en la que los profesionales de la orientación de la Comunidad Autónoma estudiada, consideran que sus necesidades de formación no son atendidas por la Administración. No obstante, las características complejas del puesto de trabajo que ocupan actualmente estos profesionales y su grado de indefinición, así como las limitaciones de los instrumentos de investigación social utilizados generalmente para la evaluación de necesidades de grandes colectivos dispersos, apuntan a la conveniencia de unas estrategias de evaluación formación basadas en el modelo de reflexión sobre la acción de los profesionales de la orientación en su propia práctica profesional.Training guidance staff personnel actualy attending guidance and counseling services in Spain is an issue demanded by The National Educational Sistem Reform yet started. This important issue is delayed at the present by the most regional education authorities. Need assesment demands a careficlly and sistematic planning and implementation in so far it will be the started point of education and training programs development for counselors. The present paper is an account of a needs training evaluation research on Andalusian (southern Spain) counselors perception about training and continuing education they have received from regional education authorities. The main issues of the research focused on: - Initial in service training counselors received joining the Guidance Services - Special needs and training interests the counselors realice at the present - Interest and oportunity of a joint training venture between Guidance Services and Universities. Research finding pointed out a widespread lack of regional education authorities offers on counselors in service training and the convenience of a reflective practitioner in service training model for counselors linking in the same process both the peed assesment and training delivery system

Biofiltración para la remoción de sulfuro de hidrógeno en la estación de bombeo norte de aguas residuales

Wastewater pumping stations generate offensive odors due to the presence of sulfur compounds, this can cause inconvenience to the communities near these places. A biological system was implemented for the reduction of hydrogen sulfide in North Wastewater Pumping Station of Santa Marta. Were designed, built and installed two biofilters in acrylic with a height of two meters and an inside diameter of 20,32 centimeter, loaded with sugar cane bagasse as a means of support . The system available of permanent wastewater supply for maintains moisture and nutrients for microorganism, as well as metering, control and data acquisition devices. The results showed reduction of high loads of hydrogen sulfide and removal efficiencies of up to 100%, however it required a stabilization period of 14 days, to maintain the maximum efficiency gains.Las estaciones de bombeo de aguas residuales generan olores ofensivos debido a la presencia de compuestos sulfurados, ocasionando molestias a las comunidades ubicadas en las proximidades. Se implementó un sistema biológico para la reducción del sulfuro de hidrogeno en la Estación de Bombeo Norte del Distrito de Santa Marta, para lo que se diseñaron, construyeron e instalaron dos biofiltros en material acrílico con una altura de 2 m y un diámetro interior de 20,32 cm, cargados con bagazo de caña de azúcar como medio de soporte. El sistema disponía de alimentación de aguas residuales para mantener la humedad y los nutrientes de los microorganismos, dispositivos de dosificación, control y toma de datos. Los resultados registraron reducción de altas cargas de sulfuro de hidrogeno y eficiencias de remoción de hasta 100%; sin embargo, se requirió de un periodo de estabilización de 14 días, para mantener las máximas eficiencias obtenidas

Biofiltration for the removal of hydrogen sulfide in the North Pumping Station Wastewater

Las estaciones de bombeo de aguas residuales generan olores ofensivos debido a la presencia de compuestos sulfurados, ocasionando molestias a las comunidades ubicadas en las proximidades. Se implementó un sistema biológico para la reducción del sulfuro de hidrogeno en la Estación de Bombeo Norte del Distrito de Santa Marta, para lo que se diseñaron, construyeron e instalaron dos biofiltros en material acrílico con una altura de 2 m y un diámetro interior de 20,32 cm, cargados con bagazo de caña de azúcar como medio de soporte. El sistema disponía de alimentación de aguas residuales para mantener la humedad y los nutrientes de los microorganismos, dispositivos de dosificación, control y toma de datos. Los resultados registraron reducción de altas cargas de sulfuro de hidrogeno y eficiencias de remoción de hasta 100%; sin embargo, se requirió de un periodo de estabilización de 14 días, para mantener las máximas eficiencias obtenidas.Wastewater pumping stations generate offensive odors due to the pres-ence of sulfur compounds, this can cause inconvenience to the com-munities near these places. A biological system was implemented for the reduction of hydrogen sulfide in North Wastewater Pumping Station of Santa Marta. Were designed, built and installed two biofilters in acrylic with a height of two meters and an inside diameter of 20,32 centimeter, loaded with sugar cane bagasse as a means of support . The system available of permanent wastewater supply for maintains moisture and nutrients for mi-croorganism, as well as metering, control and data acquisition devices. The results showed reduction of high loads of hydrogen sulfide and removal efficiencies of up to 100%, however it required a stabilization period of 14 days, to maintain the maximum efficiency gains

Glycosyl Oxocarbenium Ions: Structure, Conformation, Reactivity, and Interactions

Conspectus We also highlight that, from a chemical perspective, the glycosylation reaction can be described as a continuum, from unimolecular SN1 with naked oxocarbenium cations as intermediates to bimolecular SN2-type mechanisms, which involve the key role of counterions and donors. All these factors should be considered and are discussed herein. The importance of dissociative mechanisms (involving contact ion pairs, solvent-separated ion pairs, solvent-equilibrated ion pairs) with bimolecular features in most reactions is also highlighted. The role of theoretical calculations to predict the conformation, dynamics, and reactivity of the oxocarbenium ion is also discussed, highlighting the advances in this field that now allow access to the conformational preferences of a variety of oxocarbenium ions and their reactivities under SN1-like conditions. Specifically, the ground-breaking use of superacids to generate these cations is emphasized, since it has permitted characterization of the structure and conformation of a variety of glycosyl oxocarbenium ions in superacid solution by NMR spectroscopy. We also pay special attention to the reactivity of these glycosyl ions, which depends on the conditions, including the counterions, the possible intra- or intermolecular participation of functional groups that may stabilize the cation and the chemical nature of the acceptor, either weak or strong nucleophile. We discuss recent investigations from different experimental perspectives, which identified the involved ionic intermediates, estimating their lifetimes and reactivities and studying their interactions with other molecules. In this context, we also emphasize the relationship between the chemical methods that can be employed to modulate the sensitivity of glycosyl cations and the way in which glycosyl modifying enzymes (glycosyl hydrolases and transferases) build and cleave glycosidic linkages in nature. This comparison provides inspiration on the use of molecules that regulate the stability and reactivity of glycosyl cations

Health sciences students’ perceptions of the role of the supervisor in clinical placements

The supervision of clinical placements is essential to achieving a positive learning experience in the clinical setting and which supports the professional training of those being supervised. The aim of this study was to explore health sciences students’ perceptions of the role of the supervisor in the supervision of clinical placements. A quantitative methodology was used, administering a previously validated questionnaire, by means of an expert panel and a pre-test, to 134 students from the Faculty of Nursing, Physiotherapy and Podiatry at the University of Seville (Spain). The analysis of variables was carried out by means of a data matrix. The results revealed a statistically significant difference in the perception of placement supervision depending on the degree, with Nursing producing the highest degree of affirmation in the variables studied and the greatest satisfaction with placement supervision; in contrast, Physiotherapy produced the greatest dissatisfaction and the lowest degree of affirmation. The study and analysis of these perceptions facilitates the collection of relevant information in order to formulate actions that help to improve the supervision experience during placements. They also allow a greater understanding of what factors most influence the experience of supervision during clinical placements

A novel low-pass filter based on dielectric impedance inverters to enhance the multipactor breakdown threshold

This work presents a novel low-pass filter based on using dielectric materials, in the critical areas of the structure, to prevent high-power space condition adverse effects, like multipactor breakdown. It is shown that the use of dielectric pieces in the inverters of the filter leads to increased gaps between metallic parts in the irises. In addition, by completely filling up the air space in critical gaps, the multipactor breakdown thresholds can be increased. Moreover, they also lead to a volume reduction, increasing compactness of the structure. To demonstrate the proposed concept, a prototype has been manufactured with an aluminum housing and a Teflon dielectric material, and tested for multipactor effect at ESA-VSC Laboratory. Tests confirmed that the manufactured filter has good electrical performance with cut-off frequency 13.6 GHz, insertion losses 0.32 dB, return losses better than 15 dB, and additionally does not show multipactor breakdown up to the maximum power tested in the experimental facility (5.5 kW).This research work has been financially supported by the Spanish Ministerio de Ciencia e Innovación in the frame of the project “Green an Efficient Technologies for Advanced Telecommunication Systems (GRETAS)” with Ref. TPID2019-103982RB-C42