On higher-order corrections in a four-fermion Lifshitz model

We study a flavour-violating four-fermion interaction in the Lifshitz context, in 3+1 dimensions and with a critical exponent z=3. This model is renormalizable, and features dynamical mass generation, as well as asymptotic freedom. At one-loop, it is only logarithmically divergent, but the superficial degree of divergence of the two-point functions is 3. We calculate the two-loop corrections to the propagators, and show that, at this order, the Lorentz-violating corrections to the IR dispersion relation are quadratic in the cut off. Furthermore, these corrections are too important to represent a physical effect. As a consequence, the predictive power of the model in terms of Lorentz-violating effects in the propagation of particles is limited.Comment: 20 pages, 3 figures, comments adde

Lunar soil properties and soil mechanics

The long-range objectives were to develop methods of experimentation and analysis for the determination of the physical properties and engineering behavior of lunar surface materials under in situ environmental conditions. Data for this purpose were obtained from on-site manned investigations, orbiting and softlanded spacecraft, and terrestrial simulation studies. Knowledge of lunar surface material properties are reported for the development of models for several types of lunar studies and for the investigation of lunar processes. The results have direct engineering application for manned missions to the moon

Combining representations in working memory: A brief report

A task combining both digit and Corsi memory tests was administered to a group of 75 children. The task is shown to share variance with standardized reading and maths attainments, even after partialling out performance on component tasks separately assessed. The emergent task property may reflect coordination skills, although several different refinements can be made to this general conclusion

Hardware acceleration of reaction-diffusion systems:a guide to optimisation of pattern formation algorithms using OpenACC

Reaction Diffusion Systems (RDS) have widespread applications in computational ecology, biology, computer graphics and the visual arts. For the former applications a major barrier to the development of effective simulation models is their computational complexity - it takes a great deal of processing power to simulate enough replicates such that reliable conclusions can be drawn. Optimizing the computation is thus highly desirable in order to obtain more results with less resources. Existing optimizations of RDS tend to be low-level and GPGPU based. Here we apply the higher-level OpenACC framework to two case studies: a simple RDS to learn the ‘workings’ of OpenACC and a more realistic and complex example. Our results show that simple parallelization directives and minimal data transfer can produce a useful performance improvement. The relative simplicity of porting OpenACC code between heterogeneous hardware is a key benefit to the scientific computing community in terms of speed-up and portability

FLUORINE DISPOSAL USING CHARCOAL

Wood, coke, and coconut-shell charcoals were evaluated for fluorine entrapment. The coconut-shell charcoal produced the smallest amount of solid and liquid reaction products. Efficient removal of fluorine was accomplished by the coconut-shell charcoal in a 5-in.-diameter reactor with a feed containing 25% fluorine at flow rates from 100 to 400 scfh and reactor-wall temperatures of 1200 to 1800 deg F. (C.J.G.

Health-Related Quality of Life in Physically Active Individuals with a History of Injury

Individuals around the globe engage in physical activity for personal interest or general health and fitness. Although participation in regular physical activity is important for general health it also brings with it the risk of injury. Ankle sprains, anterior cruciate ligament tears, and concussions are just a few of the injuries sustained by physically active individuals with long-term implications. With the number of physically active individuals on the rise, sports-related injuries are of growing concern. Health-related quality of life (HRQOL) is a personal evaluation of everyday functioning and well-being. A variety of injuries and health conditions associated with physical activity have been linked to HRQOL deficits. Despite these findings, the literature has yet to determine the influence of injury in physically active populations on the multidimensional profile of HRQOL. The purpose of this dissertation was to explore the influence of injury history of HRQOL in physically active individuals. The purpose of the literature review was to systematically summarize the extent to which HRQOL deficits are present in individuals with chronic ankle instability (CAI) and adolescent and collegiate athletes. The purposes of these studies were to explore HRQOL differences between individuals with and without CAI, to determine if clinical and laboratory measure of function can predict HRQOL scores in individuals with CAI, and to examine the scale structure of the Disablement in the Physically Active Scale (DAP), as well as, the influence of injury and participation on HRQOL in collegiate athletes. The results of the systematic reviews suggest that CAI and sports-related injuries are associated with decreased HRQOL. In Project I, individuals with CIA displayed decreased HRQOL based on generic, region-specific, and dimension—specific patient-reported outcomes. In Project II, a combination of mechanical and functional impairments accounted for 17-36% of the variance associated with patient-outcomes related to physical function and fear. In Project III, collegiate athletes exhibited HRQOL deficits based on injury history, participation status, and time since last injury. Additionally, physical and mental subscales were identified within the existing structure of the DPA. The results of these studies expose the overlap between physical impairment and patient-reported outcomes and confirm that physically active individuals exhibit HRQOL deficits following injury. As a result, patient-reported outcomes should be used in clinical practice to treat the entire spectrum of disability

Development and Implementation of a Diabetes Management Flow Sheet in a Primary Care Practice: A Quality Improvement Project.

Primary care practices that do not utilize electronic medical records (EMR) could pose difficulty in adhering to clinical guidelines for diabetic patients. Diabetes flow sheets are a one page document that includes current practice guideline recommendations for easy access of results to promote comprehensive care. The main objective of this project was to promote adherence to diabetes guidelines with the use of a diabetes flow sheet for providers that do not utilize an EMR. Plan-Do-Study-Act was the design for this project. A total of 50 medical records were randomly selected at a primary care office. A pre and post-implementation of the diabetes flow sheet was audited for documentation of clinical practice guidelines (CPG). A post implementation evaluation was administered for the feasibility of the flow sheet and for evaluation. The results of the diabetes flow sheet to promote better adherence to CPG were significant. The total scores of the pre and post documentation mean (M) and standard deviation (SD) increased significantly from pre-implementation (M = 11.67, SD = 1.06) to post-implementation (M = 13.67, SD = 1.34), t (42) = 8.26, p\u3c.0000. The mean differences in pre-implementation and post-implementation of diabetes flow sheet was (M = 2.00, SD = 1.59) with a 95% CI ranging from [1.51 to 2.48]. Maintaining a diabetes flow sheet in the front of the paper medical record is imperative so PCPs can utilize the process of the flow sheets to establish adequate care management for health outcomes for type 2 diabetes