Application of remote sensing in the study of vegetation and soils in Idaho

There are no author-identified significant results in this report

Nursing Educators Need Our Help

There is a current demand for nurses and nursing faculty. Nursing faculty are necessary in order to meet the need for registered nurses in the United States. In order to meet the need for nursing faculty, nursing colleges are recruiting advanced degree nurses, even with little or no experience in academia. A literature review demonstrates a lack of support and orientation for novice nursing faculty. Various campaigns are underway in order to increase the number of qualified nursing faculty, yet few if any nursing programs offer an organized, structured, comprehensive orientation for new nursing faculty. Novice nursing faculty have reported feelings of apprehension, frustration and the desire to leave academia. This project implemented an online orientation program for nursing faculty at an undergraduate nursing program and measured the levels of self-efficacy before and after faculty took part in this program. Data was collected, analyzed and demonstrated that self-efficacy improved in content areas that the National League for Nursing has recommended as core competencies for nursing faculty. Although this was a small sample, it is recommended that nursing faculty receive an organized, structured, comprehensive orientation in order to minimize the feelings of inadequacy and frustration. This will increase the pool of qualified nursing faculty and therefore decrease the nursing shortage overall

Can disorder enhance incoherent exciton diffusion?

Recent experiments aimed at probing the dynamics of excitons have revealed that semiconducting films composed of disordered molecular subunits, unlike expectations for their perfectly ordered counterparts, can exhibit a time-dependent diffusivity in which the effective early time diffusion constant is larger than that of the steady state. This observation has led to speculation about what role, if any, microscopic disorder may play in enhancing exciton transport properties. In this article, we present the results of a model study aimed at addressing this point. Specifically, we present a general model, based upon F\"orster theory, for incoherent exciton diffusion in a material composed of independent molecular subunits with static energetic disorder. Energetic disorder leads to heterogeneity in molecule-to-molecule transition rates which we demonstrate has two important consequences related to exciton transport. First, the distribution of local site-specific diffusivity is broadened in a manner that results in a decrease in average exciton diffusivity relative to that in a perfectly ordered film. Second, since excitons prefer to make transitions that are downhill in energy, the steady state distribution of exciton energies is biased towards low energy molecular subunits, those that exhibit reduced diffusivity relative to a perfectly ordered film. These effects combine to reduce the net diffusivity in a manner that is time dependent and grows more pronounced as disorder is increased. Notably, however, we demonstrate that the presence of energetic disorder can give rise to a population of molecular subunits with exciton transfer rates exceeding that of subunits in an energetically uniform material. Such enhancements may play an important role in processes that are sensitive to molecular-scale fluctuations in exciton density field.Comment: 15 pages, 3 figure

Nonequilibrium dynamics of localized and delocalized excitons in colloidal quantum dot solids

Self-assembled quantum dot (QD) solids are a highly tunable class of materials with a wide range of applications in solid-state electronics and optoelectronic devices. In this perspective, we highlight how the presence of microscopic disorder in these materials can influence their macroscopic optoelectronic properties. Specifically, we consider the dynamics of excitons in energetically disordered QD solids using a theoretical model framework for both localized and delocalized excitonic regimes. In both cases, we emphasize the tendency of energetic disorder to promote nonequilibrium relaxation dynamics and discuss how the signatures of these nonequilibrium effects manifest in time-dependent spectral measurements. Moreover, we describe the connection between the microscopic dynamics of excitons within the material and the measurement of material specific parameters, such as emission linewidth broadening and energetic dissipation rate.Comment: 4 figure