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OBJECTIVES/SPECIFIC AIMS: Verbal communication is a critical component for professional development and leadership. Yet, many clinical translational scientists lack the skills in communication of their scientific work in a meaningful and exciting manner that conveys the potential impact of their work on human health to the lay public, stakeholders, and to other scientists in different fields. We hypothesized that formal communication training could improve information transfer by trainees that would enhance their career development. METHODS/STUDY POPULATION: We therefore formalized a program for the KL2 scholars at the Ohio State University Center for Clinical and Translational Science that provided training from communications experts to develop a short, concise, and relevant talk about their field of research to general audiences. The program was a hybrid of workshop and individualized training. It culminated in each of the six scholars presenting public talk at the OSU STEM research dissemination and outreach space, the STEAM Factory. The scholars were administered a survey to assess their knowledge of the concepts presented in the training prior to and following the receiving the treatment, as well as their overall assessment of the experience. RESULTS/ANTICIPATED RESULTS: The poster will present the positive results of this evaluation and the impact of the training on the KL2 scholars. DISCUSSION/SIGNIFICANCE OF IMPACT: The poster explain the training as a model that other CTSA KL2 programs could adapt for their trainees.
The instability of geophysical flows are covered in Chapter 7. From the class of geophysical flows, there are three classes that are distinct and that illustrate the salient properties when viewed from the basis of perturbations. These cases include the effects of density variations and rotation. The cases considered in this chapter are stratified flow, rotation (Rossby waves) and the Ekman layer.
Chapter 4 addresses the important topic of spatial instability for spatially evolving flows, such as shear layers, jets and wakes. The chapter starts out with a derivation of Gaster’s transformation that allows spatial growth rates to be computed from temporal growth rates. The chapter also presents a dicussion of absolute and convective instabilites, and of wavepackets. It concludes with a discussion of dicrete and continuous spectra.
Chapter 13 addresses issues associated with experimental techniques for investigating hydrodynamic instabilties. These issues include the experimental facility, model configuration and instrumentation, all of which impact our understanding of hydrodynamic instabilities.
Chapter 1 introduces the basic concepts of hydrodynamic stability theory. The chapter begins with a discussion of the classical experiments of Reynolds, and moves the reader quickly through other examples of instability found in nature. The basic equations of motion and their linearization are then introduced, which sets the up the foundation for the rest of the book.
Chapter 6 presents a discussion of instabilities in coordinate systems other than Cartesian. In this context, the Taylor problem, Görtler vortices, pipe flow, the rotating disk problem, the trailing vortex and the round jet are all presented. In each case the linearized disturbance equations are derived.
Chapter 2 is devoted to the temporal stability of incompressible flows. The equations of motion are linearized, and the Rayleigh and Orr–Sommerfeld equations are derived using normal mode analysis. Kelvin–Helmhotlz theory is then introduced for invisicd flows, followed by a number of important theorems related to invisicd flows such as Rayleigh’s Inflection Point Theorem, Fjotroft’s Thoerem and Howard’s Semicircle Theorem, all of which are discussed in detail. The chapter concludes with the stability of the laminar mixing layer.
Chapter 12 summarizes techniques of flow control and optimization. The reader is introduced into both passive and active flow control. Techniques such as flexible boundaries, wave induced forcing, feed-forward and feedback control and optimal control theory are all discussed in some detail.
Chapter 10 discusses the breakdown of hydrodynamic instability theory and the transition from laminar to turbulent flow. This chapter will expose the reader to issues effecting hydrodynamic instabilities, as well as the nonlinear breakdown of modes after linear growth, ending with a summary of a condensed history of methods that have been used to predict loss of laminar flow and the onset of transition to turbulence.
Chapter 8 addresses the intial value problem, x, where the effect of initial conditions are sought within the linear disturbance regime. Laplace transforms, moving coordinates and numerical approaches are all discussed. Examples of the latter include channel flows and the Blasius boundary layer. The chapter concludes with an in-depth discussion of optimizing the initial conditions for subcritical Reynolds numbers to obtain the maximum energy as a function of time. The concept of algebraically instability is discussed within this context, such that when the normalized energy density is greater than one, the flow is said to be algebraically unstable.
Chapter 9 moves beyond linear theory by examining weakly nonlinear theory, secondary instability theory and resonant wave interactions. The chapter concludes with a discussion of the parabolized stability equation theory, which sets linear, secondary and nonlinear instabilities within a single framework.
Chapter 11 introduces the reader to the world of direct numerical simulations. Temporal and spatial formulations are covered along with boundary and initial conditions. Time-marching methods and spatial discretization methods are also discussed. A variety of applications are then presented.