Effects of threat and motivation on classical musicians’ professional performance practice during the Covid-19 pandemic

In the past 2 years our world has experienced huge disruptions because of COVID-19. The performing arts has not been insulated from these tumultuous events with the entire music industry being thrown into a state of instability due to the paralyzing effects of the COVID-19 pandemic. In this study, we examined how classical professional musicians’ ability to cope with uncertainty, economic struggles, and work-life interplay during COVID-19 was influenced by various factors that affect a crucial part of the development and sustainment of music careers: musicians’ practice. We analyzed responses to an online survey of 309 classical performing musicians from 41 countries in Europe and Latin America across three pandemic stages: immediately before the pandemic, during the pandemic, and when vaccines were being made available and lockdowns were being reduced or lifted. Structural equation modeling indicates relationships between perceptions of threat at the peak of the pandemic and the musicians Self- or External-Based Motivation for the three periods in which respondents were asked to reflect. Findings suggest that musicians who are more internally self-motivated seemed to be more resilient to the pandemic threats and more capable of managing their practicing routines, whereas more externally motivated musicians experienced a reduction in their dedicated time to practice during lockdown. We suggest pedagogical and policy implications, as well as future lines of research that are oriented toward supporting professional musicians in assessing and understanding their motivational drives so that they can cope with situations that disrupt their professional lives

Monte Carlo modeling and simulations of the High Definition (HD120) micro MLC and validation against measurements for a 6 MV beam

Purpose: The most recent Varian® micro multileaf collimator(MLC), the High Definition (HD120) MLC, was modeled using the BEAMNRCMonte Carlo code. This model was incorporated into a Varian medical linear accelerator, for a 6 MV beam, in static and dynamic mode. The model was validated by comparing simulated profiles with measurements. Methods: The Varian® Trilogy® (2300C/D) accelerator model was accurately implemented using the state-of-the-art Monte Carlo simulation program BEAMNRC and validated against off-axis and depth dose profiles measured using ionization chambers, by adjusting the energy and the full width at half maximum (FWHM) of the initial electron beam. The HD120 MLC was modeled by developing a new BEAMNRC component module (CM), designated HDMLC, adapting the available DYNVMLC CM and incorporating the specific characteristics of this new micro MLC. The leaf dimensions were provided by the manufacturer. The geometry was visualized by tracing particles through the CM and recording their position when a leaf boundary is crossed. The leaf material density and abutting air gap between leaves were adjusted in order to obtain a good agreement between the simulated leakage profiles and EBT2 film measurements performed in a solid water phantom. To validate the HDMLC implementation, additional MLC static patterns were also simulated and compared to additional measurements. Furthermore, the ability to simulate dynamic MLC fields was implemented in the HDMLC CM. The simulation results of these fields were compared with EBT2 film measurements performed in a solid water phantom. Results: Overall, the discrepancies, with and without MLC, between the opened field simulations and the measurements using ionization chambers in a water phantom, for the off-axis profiles are below 2% and in depth-dose profiles are below 2% after the maximum dose depth and below 4% in the build-up region. On the conditions of these simulations, this tungsten-based MLC has a density of 18.7 g cm− 3 and an overall leakage of about 1.1 ± 0.03%. The discrepancies between the film measured and simulated closed and blocked fields are below 2% and 8%, respectively. Other measurements were performed for alternated leaf patterns and the agreement is satisfactory (to within 4%). The dynamic mode for this MLC was implemented and the discrepancies between film measurements and simulations are within 4%. Conclusions: The Varian® Trilogy® (2300 C/D) linear accelerator including the HD120 MLC was successfully modeled and simulated using the Monte CarloBEAMNRC code by developing an independent CM, the HDMLC CM, either in static and dynamic modes

Effects of passion, experience, and cultural politics on classical musicians’ practice during the COVID-19 pandemic

The widespread cancelation of cultural events during the early 2020 stages of the COVID-19 pandemic led professional performing musicians across the world to experience an increasing economic fragility that threatened their health and wellbeing. Within this “new normal,” developing countries have been at a higher risk due to their vulnerable health systems and cultural policies. Even in such difficult times, the music profession requires musicians to keep up their practicing routines, even if they have no professional commitments. This is because high level technical and expressive skills are crucial to sustaining a music career at a high performance level. However, it could be expected that not all musicians might have had the same engagement with music practice during lockdowns. In this study, we studied the experiences of 309 professional classical musicians based in European and Latin American countries with different levels of performing experience to examine their passionate (or lack thereof) engagement with music practice. Through the mixed methods combination of multigroup invariance and narrative analyses, we identified distinct profiles of musicians who displayed more harmonious or more obsessive passion orientations before and at the peak of the pandemic. We observed that musicians with higher levels of harmonious passion in particular were more capable of sustaining their practice at the peak of the pandemic and that these musicians were mostly located in Latin America—a paradox, considering that cultural politics supporting the careers of professional performing musicians and entrepreneurial education in Latin America are lacking to a great extent, especially in comparison with the European context. We explain this in terms of the “forced” self-management embraced by musicians in Latin American countries who want to engage with music practice both before and during the COVID-19 pandemic even if the music profession does not generate enough revenue for them

Music Self-Efficacy for Performance: An explanatory model based on Social Support

Personal perceptions of self-efficacy are particularly relevant in the field of music performance, which is oriented toward the outward expressions of one’s own ability through public performances. Within this context, a number of personal variables, including social support and performance anxiety, have been shown to be associated with musical success and are therefore relevant for research that seeks to understand the four sources of self-efficacy (mastery experiences, vicarious observation, verbal persuasion, physiological states) that are integral components of Bandura’s (2002) Social Learning Theory. Previous research, as well as observed differences among musicians associated with educational level (preuniversity) and gender (male/female), underpins the context of this study, which presents evidence regarding the factors that are capable of mediating perceptions of self-efficacy for musical performance. Specifically, the main objectives of this study were to more clearly understand relations between social support, public performance, musical performance anxiety, and self-efficacy using structural equation modeling and to compare these results according to gender. A battery of questionnaires was submitted to 359 preuniversity Spanish music students. Results highlight the relevance of family support for self-efficacy in public performance: directly and mediated through musical performance anxiety. The role of teachers and peers appeared to be relevant only for boys and was mediated through performance anxiety. Public performances lead to a greater degree of musical self-efficacy, but only in girls. Further research shall be required in order to improve pedagogical methods and help teachers increasingly individualize their teaching

Differential effects of 2C9*3 and 2C9*2 variants of cytochrome P-450 CYP2C9 on sensitivity to acenocoumarol

The 2C9*3 and 2C9*2 polymorphisms of cytochrome P-450 CYP2C9 are associated with hypersensitivity to warfarin and bleeding. The effect of these polymorphisms on sensitivity to acenocoumarol is unknown. Three groups of patients, with low, medium, or high acenocoumarol-dose requirements, were studied. Age influenced the acenocoumarol sensitivity. Bearing the 2C9*3 allele was associated with the need for a lower acenocoumarol dose (odds ratio [OR], 6.02; 95% confidence interval [CI], 1.50-24.18); 80% of carriers of the 2C9*3 allele required a low dose. The 2C9*2 allele was associated with a lower acenocoumarol-dose requirement (OR, 2.70; 95% CI, 1.11-6.58) because of a reduced risk of the need for a high acenocoumarol dose (4.8% of the patients in the high-dose group carried the 2C9*2 allele versus 34.1% and 30.2%, respectively, in the medium-dose and low-dose groups). Therefore, carriers of 2C9*3 may need a low initial loading dose of acenocoumarol. Because acenocoumarol sensitivity with the 2C9*2 variant does not seem to be clinically relevant, the drug could be an alternative to warfarin in 2C9*2 carrier

Mixed Fattening of Steers and Lambs on Improved Grasslands in Uruguay: II. Animal Performance and Productivity

In cow-calf operations in Uruguay, mixed cattle and sheep grazing on rangelands is predominant, while fattening is a specialised process. Within certain limits of the lamb/steer ratio and stocking rate, a complementary grazing effect occurs under mixed grazing, improving net results (Nolan & Connolly, 1977; Risso et al., 2002). These trials characterise animal performance under such management

Mixed Fattening of Steers and Lambs on Improved Grasslands in Uruguay: I. Pasture Performance

The use of P fertilisers together with legume broadcasting is a low cost and high impact technology for improving native grassland (Risso et al., 2001). Its use is increasing in Uruguay, although not for mixed grazing, even though this management is a common practice on native grasslands. Good pasture response may occur under mixed grazing when it is adequately managed (Nolan & Connolly, 1989). The following trials characterise pasture response with such management, in Uruguayan conditions

Optimización del desarrollo de la energia termosolar en españa en el contexto de la transición energética

CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia SolarRESUMEN: Este artículo presenta un resumen de los resultados obtenidos al estudiar cuál debe ser la evolución del mix eléctrico en España durante los próximos 30 años si se desea cumplir con determinados escenarios de reducción de las emisiones de CO2 del sector eléctrico en relación a las del año 1990. El estudio se ha realizado usando un algoritmo genético con optimización multiobjetivo. Se han considerado dos escenarios de reducción de emisiones de CO2: 1) escenario moderado del 40% (2030), 60% (2040) y 80% (2050); 2) escenario agresivo del 50% (2030), 75% (2040) y 100% (2050). Los resultados mostrados en este artículo indican que el escenario moderado es factible, sin que ello conlleve altos costes de la electricidad o excesivos vertidos. Una reducción del 80% en las emisiones de CO2 en el año 2050 requerirá un mix eléctrico renovable en un 86.34% y conllevaría un coste aproximado de la electricidad de 47,4 €/MWh. Pero si se desea cumplir el escenario agresivo (mercado eléctrico sin emisiones de CO2 en 2050) el mix eléctrico necesario supondría un coste de 62,9 €/MWh para la electricidad suministrada a la red y unos vertidos de 222,38 TWh frente a una demanda total de 316,55 TWh, lo que supone un excesivo porcentaje de vertidos. Los resultados obtenidos también han mostrado que la única forma de poder obtener un mix eléctrico 100% renovable en 2050 sin unos excesivos vertidos sería disponer de tecnologías competitivas de almacenamiento y gestión a gran escala de la electricidad excedente, porque esto permitiría reducir de forma muy importante la potencia instalada de fotovoltaica, eólica y termosolar, consiguiéndose menores costes de la electricidad y menores vertidos.ABSTRACT: This paper shows a summary of the results obtained when analysing how the Spanish electricity mix must evolve during next 30 years to fulfil two different scenarios of CO2 emissions reduction in comparison with those in 1990. A multi-objective genetic algorithm has been used to perform the study. Two different scenarios have been analysed: 1) moderate trend of 40% (2030), 60% (2040) y 80% (2050) reduction; 2) aggressive trend of 50% (2030), 75% (2040) and 100% (2050). Results given in this paper show that the moderate trend is feasible regarding both the electricity cost and the curtailments. A reduction of 80% in 2050 would require an 86.34% renewable electricity market with an electricity cost of 47,4 €/MWh. On the other hand, for the fulfilment of the aggressive trend (no CO2 emissions in 2050) the electricity cost and the curtailments would be 62,9 €/MWh and 222,38 TWh, respectively, with a total electricity demand of only 316,55 TWh. This level of curtailments is clearly excessive. The obtained results have also shown that the only way to achieve a 100% renewable electricity market in Spain in 2050 without excessive curtailments would be the use of cost-effective electricity storage technologies because they would allow a significant reduction of the required installed power of photovoltaic, wind and solar thermal electricity plants, while reducing the electricity cost and the curtailments simultaneously.info:eu-repo/semantics/publishedVersio