El Burnout es el estado de vulnerabilidad emocional o desgaste profesional de las personas que ejercen funciones laborales relacionadas con los servicios humanos, que tienen que estar en constante ...contacto con los usuarios, por ello, es esencial comprender cómo afecta en el ambiente de trabajo y en las relaciones interpersonales de los colaboradores. El propósito de la investigación es determinar la relación existente entre el Síndrome de Burnout y el ambiente laboral de los colaboradores de la Municipalidad Provincial de Sullana-Perú. La metodología se basó en un enfoque cuantitativo y diseño no experimental de tipo transaccional denominado correlacional. Se utilizó una muestra de 70 colaboradores de las diferentes subgerencias que comprenden el área de Desarrollo Social, mediante una distribución equitativa de hombres y mujeres. Para la evaluación de la variable Síndrome de Burnout, se aplicó el cuestionario de Burnout de Maslach, MBI-Ed, en su versión española, así como el cuestionario para la variable de ambiente de trabajo AT-ARG. Los resultados señalan que existe una correlación inversa entre Síndrome de Burnout y ambiente de Trabajo, y sus dos primeras dimensiones agotamiento emocional y despersonalización. Se concluye que mientras exista un ambiente laboral congestionado y poco participativo, el síndrome de Burnout aumentará.
El turismo es una fuente generadora de ingresos por excelencia que otorga oportunidades de crecimiento a espacios geográficos con alto potencial turístico. El propósito del presente artículo fue ...determinar la relación entre la calidad del servicio en las empresas turísticas de hospedajes, restaurantes y medios de transporte con la satisfacción del cliente en el distrito de Canchaque, Piura-Perú. Por la naturaleza de las variables es un estudio subjetivo, no experimental de corte transversal, de nivel correlacional y por la forma de procesar la información es cuantitativo. El instrumento utilizado tiene un indicativo de consistencia y coherencia alfa de Cronbach de 0.920 para la parte del cuestionario correspondiente a hospedajes; de 0.902 en restaurantes y 0.914 para medios de transporte. Para determinar la calidad del servicio se utilizaron las dimensiones del modelo ServQual y para determinar el nivel de satisfacción se utilizó el enfoque unidimensional. Los resultados evidencian que la calidad de los servicios en hospedajes se relaciona de manera significativa (Sig. <0.05) con la satisfacción de los turistas. Se concluye que, los servicios que brindan los hospedajes turísticos son de calidad, en tanto que, los restaurantes presentan aspectos favorables y desfavorables, y los medios de transporte otorgan un servicio deficiente.
Powder-based additive manufacturing technologies such as selective laser melting (SLM) and selective electron beam melting (SEBM) hold great promise for producing high-value metal components with ...customized geometries. Development of scanning strategies and prediction of optimal process parameters thereby remain key factors for the fabrication of high-quality products without local inhomogeneities in alloy composition or porosity.
In this contribution, the relation between energy input, evaporation and residual porosity is numerically investigated on the titanium aluminide alloy Ti-48Al-2Cr-2Nb. The numerical model is based on a lattice Boltzmann method and includes hydrodynamics, thermodynamics and multi-component evaporation. Simulation results show that the spatial distribution of alloying elements within the final part is dominated by the advection of melt which is driven by surface tension and evaporative recoil and influenced by the random arrangement of powder particles. Regarding evaporation losses, the line energy appears to be of central importance, as it strongly affects peak temperatures during processing. For a given melt strategy there is a trade-off between porosity and loss of aluminum due to evaporation. It is demonstrated that significant reductions in evaporation losses can be achieved by application of a suitable beam scanning strategy. The presented numerical findings are consistent with experimental data.
Los recursos turísticos son fuente de inspiración y desarrollo de un espacio geográfico, puesto que, pueden posicionar a una cultura ante la visión del mundo. El Perú cuenta con una variedad de ...recursos que tienen potencial y acogida por los visitantes nacionales y extranjeros. La presente investigación tuvo como objetivo analizar los recursos turísticos de la provincia de Sullana para promover el turismo. La metodología se trabajó bajo un enfoque cuantitativo, de diseño no experimental, de tipo descriptivo y una muestra no probabilística por conveniencia, así mismo, se analizó los recursos turísticos registrados en Sigmincetur. Entre los resultados encontrados se evidenció que existen recursos turísticos que tienen concurrencia, que no cuentan con la infraestructura necesaria para acoger a los visitantes, así mismo, que el registro de recursos debe ser actualizado para seleccionar, categorizar e incorporar otros recursos con potencial turístico. Se concluyó que la provincia es una zona que tiene recursos con alto potencial para desarrollar el turismo; sin embargo, debe enfocarse en difundirlos mediante proyectos que integren a los actores sociales.
•Radiotherapy affects immune populations in the TME, including MDSCs.•Conventional fractionated radiation schedules are associated with MDSC recruitment.•Radiotherapy, inflammation and hypoxia play a ...role in MDSC function and recruitment.•Both MDSC-intrinsic and -extrinsic STING signaling are able to alter MDSC behavior.•Future studies should focus on elucidating a potential role of cGAS in MDSC function.
Myeloid derived suppressor cells (MDSCs) are a highly heterogeneous population of immature immune cells with immunosuppressive functions that are recruited to the tumor microenvironment (TME). MDSCs promote tumor growth and progression by inhibiting immune effector cell proliferation and function. MDSCs are affected by both novel anti-cancer therapies targeting the immune system to promote anti-tumor immunity, as well as by conventional treatments such as radiotherapy. Following radiotherapy, cytoplasmic double stranded DNA stimulates the cyclic GMP-AMP synthase (cGAS)/stimulator of interferon genes (STING) pathway, resulting in type I interferon production. Effectiveness of radiotherapy and cGAS/STING signaling are closely intertwined: activation of cGAS and STING is key to generate systemic anti-tumor immunity after irradiation. This review focuses on how radiotherapy and cGAS/STING signaling in MDSCs and/or tumor cells impact MDSC recruitment, expansion and function. The influence of conventional and ablative radiotherapy treatment schedules, inflammatory response following radiotherapy, and hypoxia are discussed as MDSC modulators.
BackgroundWhile national surveys showed declines in e-cigarette use in the USA between 2015 and 2016, recent reports indicate that JUUL, a sleekly designed e-cigarette that looks like a USB drive, is ...increasingly being used by youth and young adults. However, the extent of JUUL’s growth and its marketing strategy have not been systematically examined.MethodsA variety of data sources were used to examine JUUL retail sales in the USA and its marketing and promotion. Retail store scanner data were used to capture the retail sales of JUUL and other major e-cigarette brands for the period 2011–2017. A list of JUUL-related keywords was used to identify JUUL-related tweets on Twitter; to identify JUUL-related posts, hashtags and accounts on Instagram and to identify JUUL-related videos on YouTube.ResultsIn the short 3-year period 2015–2017, JUUL has transformed from a little-known brand with minimum sales into the largest retail e-cigarette brand in the USA, lifting sales of the entire e-cigarette category. Its US$150 million retail sales in the last quarter of 2017 accounted for about 40% of e-cigarette retail market share. While marketing expenditures for JUUL were moderate, the sales growth of JUUL was accompanied by a variety of innovative, engaging and wide-reaching campaigns on Twitter, Instagram and YouTube, conducted by JUUL and its affiliated marketers.ConclusionsThe discrepancies between e-cigarette sales data and the prevalence of e-cigarette use from surveys highlight the challenges in tracking and understanding the use of new and emerging tobacco products. In a rapidly changing media environment, where successful and influential marketing campaigns can be conducted on social media at little cost, marketing expenditures alone may not fully capture the influence, reach and engagement of tobacco marketing.
This volume offers new insights into figurative language and its pervasive role as a factor of linguistic change. The case studies included in this book explore some of the different ways new ...metaphoric and metonymic expressions emerge and spread among speech communities, and how these changes can be related to the need to encode ongoing social and cultural processes in the language. They cover a wide series of languages and historical stages.
El objetivo del presente estudio ha sido analizar la relación existente entre la danza y el aumento de los niveles de autoestima en las diferentes dimensiones que la conforman en niños y niñas de ...educación primaria. Para ello, se diseña e implementa un programa de danza librecreativa dentro de la asignatura de Educación Física, con una duración de 13 sesiones, dirigido al alumnado de tercer ciclo de primaria. Como instrumento de recogida de información se utiliza el Cuestionario Multimedia y Multilenguaje de Evaluación de la Autoestima desarrollado y validado por Ramos en 2008. Se establecen dos grupos, uno experimental; y otro de control. Los resultados encontrados demuestran la utilidad de este tipo de programas, y cómo la danza libre-creativa favorece el incremento de los niveles de autoconcepto de habilidad física, autoconcepto de apariencia física, autoconcepto social, autoconcepto de estabilidad emocional y autoconcepto general, fomentando de esta forma la autoestima global del alumnado de tercer ciclo de primaria.
Renewable energy sources have emerged as an alternative to meet the growing demand for energy, mitigate climate change, and contribute to sustainable development. The integration of these systems is ...carried out in a distributed manner via microgrid systems; this provides a set of technological solutions that allows information exchange between the consumers and the distributed generation centers, which implies that they need to be managed optimally. Energy management in microgrids is defined as an information and control system that provides the necessary functionality, which ensures that both the generation and distribution systems supply energy at minimal operational costs. This paper presents a literature review of energy management in microgrid systems using renewable energies, along with a comparative analysis of the different optimization objectives, constraints, solution approaches, and simulation tools applied to both the interconnected and isolated microgrids. To manage the intermittent nature of renewable energy, energy storage technology is considered to be an attractive option due to increased technological maturity, energy density, and capability of providing grid services such as frequency response. Finally, future directions on predictive modeling mainly for energy storage systems are also proposed.
The resulting properties of parts fabricated by powder bed fusion additive manufacturing processes are determined by their porosity, local composition, and microstructure. The objective of this work ...is to examine the influence of the stochastic powder bed on the process window for dense parts by means of numerical simulation. The investigations demonstrate the unique capability of simulating macroscopic domains in the range of millimeters with a mesoscopic approach, which resolves the powder bed and the hydrodynamics of the melt pool. A simulated process window reveals the influence of the stochastic powder layer. The numerical results are verified with an experimental process window for selective electron beam-melted Ti-6Al-4V. Furthermore, the influence of the powder bulk density is investigated numerically. The simulations predict an increase in porosity and surface roughness for samples produced with lower powder bulk densities. Due to its higher probability for unfavorable powder arrangements, the process stability is also decreased. This shrinks the actual parameter range in a process window for producing dense parts.
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