Solidification and processing of aluminium based immiscible alloys

Copyright @ 2009 TMSThe Al-Sn and Al-Pb based immiscible alloys have significant potential for bearing applications. However, the mixing and understanding of solidification process for immiscible alloys have been long standing challenges for their development. This paper presents solidification and microstructural evolution of the Al-Sn-Cu alloys and also describes the mechanism of effective mixing by the intensive shearing. The experimental work was also focused on analyzing the effects of shear rate, temperature and time on Sn droplets size and their distribution. Results have been compared with earlier study on Al-Si-Pb alloys. Experimental results suggest that the intensive shearing process produces homogeneous and finely dispersed Sn and Pb droplets.This work was funded by the EPSRC and DTI

A thin film model for corotational Jeffreys fluids under strong slip

We derive a thin film model for viscoelastic liquids under strong slip which obey the stress tensor dynamics of corotational Jeffreys fluids.Comment: 3 pages, submitted to Eur. Phys. J.

Засоби систем захисту доступом та модель класифікації рівнів захисту

We use Kieffer's model to represent the vibrational density of states (VDoS) and thermodynamic properties of pure substances in pressure-temperature space. We show that this model can be simplified to a vibrational model in which the VDoS is represented by multiple Einstein frequencies without significant loss of accuracy in thermodynamic properties relative to experimental data. The resulting analytical expressions for thermodynamic properties, including the Gibbs energy, are mathematically simple and easily accommodated in existing computational software for making thermodynamic databases. We show for aluminium, platinum, orthoenstatite and forsterite that thermodynamic properties can be represented with comparable accuracy as with Kieffer's model with the same number of fitting parameters as in the Mie-Grüneisen-Debye model. We demonstrate that the method enables to achieve thermodynamic properties with superior accuracy relative to the Mie-Grüneisen-Debye method. The method is versatile in the sense that it allows incorporating dispersion of Grüneisen parameters. It is possible to extend the formalism to include other physical effects, such as intrinsic anharmonicity in the same way as in vibrational models based on Kieffer's formalism

From Burnout to Wellness: Using Appreciative Inquiry to Shift MidMichigan Health towards a Strengths-based Perspective

Over half of providers in the healthcare field experience burnout. Burnout syndrome is defined by the prolonged psychological and physiological response to chronic and interpersonal job stressors, and can result in a number of symptoms that negatively affect workplace morale and performance, including physical exhaustion, job dissatisfaction, and feelings of hopelessness. MidMichigan Health (MMH), a division of the University of Michigan Health system that serves nearly 1 million people in Michigan, has created the Provider Wellness and Burnout Council (PWBC) to address issues of burnout within the organization. To build on their initial work, we propose a long-term intervention based on the science of physician well-being, appreciative inquiry, goal-setting, and employee engagement. This intervention is intended to promote well-being among MMH providers through the creation of a clear, robust positive vision for provider well-being that involves all organization stakeholders throughout the development and execution of this vision. In light of the emerging COVID-19 pandemic and the subsequent strain on our nation’s healthcare resources, we have also proposed a short-term intervention for addressing provider well-being by sharing with providers easy, evidence-based resilience interventions