Temperature Dependent Neutron Scattering Sections for Polyethylene

This note presents neutron scattering cross sections for polyethylene at 296 K, 77 K and 4 K derived from a new scattering kernel for neutron scattering off of hydrogen in polyethylene. The kernel was developed in ENDF-6 format as a set of S(alpha,beta) tables using the LEAPR module of the NJOY94 code package. The polyethylene density of states (from 0 to sub eV) adopted to derive the new kernel is presented. We compare our calculated room temperature total scattering cross sections and double differential cross sections at 232 meV at various angles with the available experimental data (at room temperature), and then extrapolate the calculations to lower temperatures (77K and 4K). The new temperature dependent scattering kernel gives a good quantitative fit to the available room temperature data and has a temperature dependence that is qualitatively consistent with thermodynamics.Comment: 6 page

Lymphedema Therapy for the Treatment of Complex Regional Pain Syndrome

Theory: This proposal presents the theory that the use of early lymphatic management techniques for patients who suffer from complex regional pain syndrome (CRPS) can limit CNS remodeling, preventing progression of the disorder. In absence of high quality evidence, we interviewed multiple lymphedema therapists to assist in the generation of a lymphatic management protocol for use with patients experiencing CRPS-associated pain and edema. The pathophysiology of CRPS-associated edema is not fully understood. Potential causes may include vasomotor dysregulation or neurogenic inflammation. Regardless of its cause, edema and pain may lead to excessive muscle guarding and kinesiophobia. Targeting edema early may inhibit progression of the disease before pain becomes centrally mediated. Lymphedema therapy, including manual lymphatic drainage (MLD) and compressive garments, is commonly used to treat patients with compromised circulatory or lymphatic systems. Based on a limited number of low quality studies, MLD has shown conflicted results for improvement of CRPS symptoms. However, these studies have evaluated MLD as an isolated treatment rather than as a component of a comprehensive treatment protocol. None of these studies have investigated the effect of compression garments or early intervention. In light of the limited available research on this topic, expert opinion may provide further insight into the effectiveness of this modality. To support the plausibility of our theory, we have interviewed experienced lymphedema therapists who have treated CRPS with a combination of MLD and compression garments as part of a comprehensive PT treatment plan. Lymphatic drainage applied proximally to the affected limb creates a negative pressure gradient that draws out edematous fluid, providing relief from symptoms without needing to touch the edematous limb. With less pain and discomfort, patients have greater potential to gain functional mobility, which can prevent further complication. Compression garments maintain the pressure gradient for longer treatment effects; interviewed experts report that individual patients have tolerated their use. Traditional protocol for lymphatic drainage is followed for CRPS patients, including teaching independent care, though progression may be slower. No additional contraindications or precautions for the CRPS population were identified. The incorporation of lymphatic management into a comprehensive treatment plan allows for additional tools to decrease disability in CRPS patients with edema. Knowledge of this modality as a treatment option may help improve physical therapy outcomes. Learning to manage CRPS symptoms will help patients decrease kinesiophobia and increase functional capacity

Ensemble Concerts: Berlioz Requiem, May 5, 1974

University AuditoriumSunday EveningMay 5, 19748:00 p.m