Ab initio electronic structure calculations of solid, solution-processed metallotetrabenzoporphyrins

An ab initio study of the electronic structures of solid metallotetrabenzoporphyrins (MTBPs) utilized in organic transistors and photovoltaics is presented. Bandstructures, densities of states, and orbitals are calculated for H2, Cu, Ni, and Zn core substitutions of the unit cell of solid TBP, as deposited via soluble precursors that are thermally annealed to produce polycrystalline, semiconducting thin-films. While the unit cells of the studied MTBPs are nearly isomorphous, substitution of the core atoms alters the structure of the bands around the energy bandgap and the composition of the densities of states. Cu and Ni core substitutions introduce nearly-dispersionless energy bands near the valence and conduction band edges, respectively, that form acceptor or deep generation/recombination states.Comment: 7 pages, 3 figures, 4 table

Closing the Divide: How Medical Homes Promote Equity in Health Care

Presents findings from the Commonwealth Fund 2006 Health Care Quality Survey, and demonstrates how having stable insurance, a regular provider and, in particular, a medical home, improves health care access and quality among vulnerable populations

An Improved Model for Relativistic Solar Proton Acceleration applied to the 2005 January 20 and Earlier Events

This paper presents results on modelling the ground level response of the higher energy protons for the 2005 January 20 ground level enhancement (GLE). This event, known as GLE 69, produced the highest intensity of relativistic solar particles since the famous event on 1956 February 23. The location of recent X-ray and gamma-ray emission (N14 W61) was near to Sun-Earth connecting magnetic field lines, thus providing the opportunity to directly observe the acceleration source from Earth. We restrict our analysis to protons of energy greater than 450 MeV to avoid complications arising from transport processes that can affect the propagation of low energy protons. In light of this revised approach we have reinvestigated two previous GLEs: those of 2000 July 14 (GLE 59) and 2001 April 15 (GLE 60). Within the limitations of the spectral forms employed, we find that from the peak (06:55 UT) to the decline (07:30 UT) phases of GLE 69, neutron monitor observations from 450 MeV to 10 GeV are best fitted by the Gallegos-Cruz & Perez-Peraza stochastic acceleration model. In contrast, the Ellison & Ramaty spectra did not fit the neutron monitor observations as well. This result suggests that for GLE 69, a stochastic process cannot be discounted as a mechanism for relativistic particle acceleration, particularly during the initial stages of this solar event. For GLE 59 we find evidence that more than one acceleration mechanism was present, consistent with both shock and stochastic acceleration processes dominating at different times of the event. For GLE 60 we find that Ellison & Ramaty spectra better represent the neutron monitor observations compared to stochastic acceleration spectra. The results for GLEs 59 and 60 are in agreement with our previous work.Comment: 42 pages, 10 figures, 10 tables, published in ApJ, August 200

Spinal Progenitor-Laden Bridges Support Earlier Axon Regeneration Following Spinal Cord Injury.

Impact statementSpinal cord injury (SCI) results in loss of tissue innervation below the injury. Spinal progenitors have a greater ability to repair the damage and can be injected into the injury, but their regenerative potential is hampered by their poor survival after transplantation. Biomaterials can create a cell delivery platform and generate a more hospitable microenvironment for the progenitors within the injury. In this work, polymeric bridges are used to deliver embryonic spinal progenitors to the injury, resulting in increased progenitor survival and subsequent regeneration and functional recovery, thus demonstrating the importance of combined therapeutic approaches for SCI

Addressing social, emotional, and organizational goals for a child with an autism spectrum disorder (ASD) using the Cognitive Orientation to daily Occupational Performance (CO-OP) approach

Children with autism spectrum disorders (ASDs) have social, emotional, and organizational skill deficits which are frequently addressed through behavioral based skills training. However, these approaches often do not result in generalization of skills. This case study sought to understand if the Cognitive Orientation to daily Occupational Performance (CO-OP), a problem-solving approach, is effective for addressing social, emotional, and organizational goals with a child with an ASD. Pre and post-intervention assessments indicated an improvement on all three client-centered goals, with the client transferring his goals and problem-based strategies to the community. Analysis of video recordings of the intervention sessions indicated the global strategies Goal-PlanDo-Check were effective, with the participant spending most time in “plan.” A majority of the domain specific strategies did not apply to this case study. Additionally, the participant utilized “verbal guidance by therapist” most often and spent a majority of dimension of time on task “talking about the task.

Cosmic ray tables - Asymptotic directions, variational coefficients and cut-off rigidities IQSY instruction manual no. 10

Cosmic ray deflections in geomagnetic field, variational coefficients, and diurnal intensity variations - table

Mirror, Mirror on the Wall: An International Update on the Comparative Performance of American Health Care

Using data from patient and physician surveys, finds that the U.S. healthcare system ranks last or next-to-last when comparing healthcare performance against that of five other nations -- Australia, Canada, Germany, New Zealand, the United Kingdom

Efficacy of Work-Related Training for Individuals with Autism Spectrum Disorder

Research suggests that traditional models of work-related training, in addition to a lack of on-the-job support, may exacerbate difficulties experienced by individuals with autism spectrum disorder with obtaining and maintaining employment The poor employment outcomes experienced by individuals with ASD are well-documented throughout literature and have resulted in the need to examine more effective ways of providing support and work-related interventions. Although research has investigated the efficacy of work-related training on successful employment outcomes when used with individuals with ASD, a systematic review summarizing this evidence has yet to be published. Therefore, this review examines and interprets current research evidence on the efficacy of work-related training for individuals

Timescales of spike-train correlation for neural oscillators with common drive

We examine the effect of the phase-resetting curve (PRC) on the transfer of correlated input signals into correlated output spikes in a class of neural models receiving noisy, super-threshold stimulation. We use linear response theory to approximate the spike correlation coefficient in terms of moments of the associated exit time problem, and contrast the results for Type I vs. Type II models and across the different timescales over which spike correlations can be assessed. We find that, on long timescales, Type I oscillators transfer correlations much more efficiently than Type II oscillators. On short timescales this trend reverses, with the relative efficiency switching at a timescale that depends on the mean and standard deviation of input currents. This switch occurs over timescales that could be exploited by downstream circuits