Adiabatic evolution of 1D shape resonances: an artificial interface conditions approach

Artificial interface conditions parametrized by a complex number $\theta_{0}$ are introduced for 1D-Schr\"odinger operators. When this complex parameter equals the parameter $\theta\in i\R$ of the complex deformation which unveils the shape resonances, the Hamiltonian becomes dissipative. This makes possible an adiabatic theory for the time evolution of resonant states for arbitrarily large time scales. The effect of the artificial interface conditions on the important stationary quantities involved in quantum transport models is also checked to be as small as wanted, in the polynomial scale $(h^N)_{N\in \N}$ as $h\to 0$, according to $\theta_{0}$.Comment: 60 pages, 13 figure

Adolescent Girls’ Perspectives on Their Relationships with their Nonresident Fathers

Eleven adolescent girls participated in this multiple case study exploring fathers’ influence on their academic performance, self-efficacy, and personal resilience.https://scholarworks.waldenu.edu/archivedposters/1007/thumbnail.jp

Student Wellbeing Matters! Use Positive Psychology Interventions to Help Your Students Achieve and Succeed.

Positive Psychology Interventions (PPI), grounded in the psychological theory of Wellbeing (Seligman, 2002) are pathways to a life of purpose and meaning. Each intervention is proved to not only reduce anxiety and increase optimism, but to create protective factors needed to cope with stress, anxiety and trauma

Story Slam Rx: Is Connection to Personal Stories in Medicine an Antidote to Burnout

With the increasing demands of the contemporary healthcare system, providers are spending less time with colleagues in a team environment or engaged in direct patient care. This has been identified as a key factor in physician dissatisfaction and burn out.1 The Story Slam event aims to reconnect providers and trainees with their sense of meaning by focusing attention on their stories. Under the conceptual umbrella of “narrative medicine,” there is growing recognition that the stories that run beneath the medical encounter can provide important insights and represent a pathway to greater well-being for providers.2,3 Our study has a two-fold approach. Initially, it aims to evaluate the concept of venting, sharing, and storytelling as a means of reinvigorating the medical space. Secondarily, it serves as a quality improvement project, given that we hypothesize a renewed sense of accomplishment and a decreased sense of burnout -even if only temporary. This will subsequently lead to increased job satisfaction, improved employee performance, and heightened quality of life

Constraints in the compensatory response of a tallgrass prairie plant community to the loss of a dominant species

Includes bibliographical references.2020 Summer.Biodiversity loss is one of the major consequences of global change driven by human activities. The loss of a dominant species is expected to have profound consequences on ecosystem processes (e.g. aboveground productivity) given their highest relative abundance and proportionally large contribution to community biomass production. However, through competitive release, the newly available resources following its lost, are expected to be utilized by the remaining species in the community to increase in abundance and compensate for the function lost. Complete functional compensation does not occur in every ecological community following the loss of dominant species or entire functional groups, and 1) limited resource availability, 2) absence of functionally redundant species, and 3) lack of functional traits that promote compensation have been proposed as possible constraints on compensation. In this dissertation, I evaluate the effect of removing these constraints on the biomass compensation response of a tallgrass prairie plant community following the loss of the dominant species, the C4 tallgrass, Andropogon gerardii Vitman. I experimentally removed the dominant species from a native intact tallgrass prairie plant community at Konza Prairie Biological Station, Kansas, where I selected two contrasting sites, one with functionally redundant species Panicum virgatum L. and Sorghastrum nutans (L.) Nash in low abundances, and a second site where those functionally redundant were codominants with A. gerardii. The first site was irrigated to alleviate water limitation during four growing seasons and fertilized with nitrogen during the final season of the experiment. The second site did not exhibit water limitation and was fertilized during the second growing season of the two-year experiment. My results show that in the short-term removing resource limitation promoted aboveground primary productivity but not enough to produce full biomass compensation. The presence of functionally redundant species, also C4 tall grasses with similar functional effect traits as A. gerardii, did increase aboveground biomass production, but did not promote full biomass compensation, not even when they were present in high abundance. I hypothesize that additional to the constraints proposed, compensation is limited by response traits in the remaining species that limit their demographic response to the increased available space, light, water and soil resources following the loss of the dominant species. Overall, my results show the compensation approach is important to evaluate not only the effect of species loss on ecosystem processes, but also the response of the remaining species and their ability to compensate for the function lost. They also suggest the existence of additional mechanisms in play that need to be identified and tested in order to improve the understanding of how communities recover in the face of biodiversity loss

Double scale analysis of a Schrödinger-Poisson system with quantum wells and macroscopic nonlinearities in dimensions 2 and 3

We consider the stationary Schrödinger-Poisson model with a background potential describing a quantum well. The Hamiltonian of this system composes of contributions the background potential well plus a nonlinear repulsive term which extends on different length scales with ratio parametrized by the small parameter h. With a partition function which forces the particles to remain in the quantum well, the limit h?0 in the nonlinear system leads to different asymptotic behaviours, including spectral renormalization, depending on the dimensions 1, 2 or 3

Enhancing Employment Opportunities for Mature Workers Through Training: Case Studies of Employment Services in Massachusetts

Extension of working years among those approaching “normal” retirement ages is receiving increased attention. Much of the impetus is financial. The weakening of private pension systems is leaving increasing numbers of those approaching retirement with inadequate savings. Rising health care costs and the erosion of retiree health benefits also encourages older workers to remain in the workforce. The current recession has greatly escalated the financial concerns of those who are late in their working lives. With the deterioration of financial markets, the values of 401K portfolios have declined enormously. Further, the decline in home prices has left many with substantial reductions in home equity. In addition, some mature workers are among those with home mortgages that exceed the market values of their homes

Writing-to-Learn Using Social Pedagogy and Technology

Accounting faculty from LaGuardia will share the structure and results of an initiative centered on using ePortfolio and social pedagogy to facilitate writing-to-learn for accounting students. Through a series of ePortfolio-based assignments that connected two classes, along with an in-class writing workshop conducted by non-discipline faculty, students worked together to understand the importance of writing in the accounting discipline and strengthened their writing abilities