Distinguishing coherent atomic processes using wave mixing

We are able to clearly distinguish the processes responsible for enhanced low-intensity atomic Kerr nonlinearity, namely coherent population trapping and coherent population oscillations in experiments performed on the Rb D1 line, where one or the other process dominates under appropriate conditions. The potential of this new approach based on wave mixing for probing coherent atomic media is discussed. It allows the new spectral components to be detected with sub-kHz resolution, which is well below the laser linewidth limit. Spatial selectivity and enhanced sensitivity make this method useful for testing dilute cold atomic samples.Comment: 9 pages, 5 figure

Time transfer using NAVSTAR GPS

A time transfer unit (TTU) developed for the U.S. Naval Observatory (USNO) has consistently demonstrated the transfer of time with accuracies much better than 100 nanoseconds. A new time transfer system (TTS), the TTS 502 was developed. The TTS 502 is a relatively compact microprocessor-based system with a variety of options that meet each individual's requirements, and has the same performance as the USNO system. The time transfer performance of that USNO system and the details of the new system are presented

Double-averaged velocity profiles over fixed dune shapes

Peer reviewedPublisher PD

The envirome and the connectome: exploring the structural noise in the human brain associated with socioeconomic deprivation

Complex cognitive functions are widely recognized to be the result of a number of brain regions working together as large-scale networks. Recently, complex network analysis has been used to characterize various structural properties of the large scale network organization of the brain. For example, the human brain has been found to have a modular architecture i.e. regions within the network form communities (modules) with more connections between regions within the community compared to regions outside it. The aim of this study was to examine the modular and overlapping modular architecture of the brain networks using complex network analysis. We also examined the association between neighborhood level deprivation and brain network structure – modularity and grey nodes. We compared network structure derived from anatomical MRI scans of 42 middle-aged neurologically healthy men from the least (LD) and the most deprived (MD) neighborhoods of Glasgow with their corresponding random networks. Cortical morphological covariance networks were constructed from the cortical thickness derived from the MRI scans of the brain. For a given modularity threshold, networks derived from the MD group showed similar number of modules compared to their corresponding random networks, while networks derived from the LD group had more modules compared to their corresponding random networks. The MD group also had fewer grey nodes – a measure of overlapping modular structure. These results suggest that apparent structural difference in brain networks may be driven by differences in cortical thicknesses between groups. This demonstrates a structural organization that is consistent with a system that is less robust and less efficient in information processing. These findings provide some evidence of the relationship between socioeconomic deprivation and brain network topology

Power and Racialisation: Exploring the Childhood and Educational Experiences of Four Mixed Young People (Who Identify as Having One Black and One White Parent)

This Interpretative Phenomenological Analysis study aims to explore the experiences and understandings of childhood and education of four young people who identify as having a mixed Black and White heritage. The research utilises the theoretical positions of Critical Race Theory and recognises intersectionality. Participants took part in semi-structured interviews, and analysis led to the proposal of a series of “higher-order” superordinate themes across participants. These themes included “The significance of culture/heritage”, “Mixedness as challenging constructions”, “The significance of intersectionality”, “Blackness as problematic”, “Mixedness as an identity”, “Racialised perceptions in the development of self-identity” and “The power of Educational Experience”. Implications for practice are explored through Reflecting on Educational Psychology Practice and considering how educational psychology practice might develop through these accounts with reference to specific cultural and ethnic competencies in the British Psychological Society “Standards for the accreditation of Educational Psychology Training” (British Psychological Society, 2019)

Crossing the Quality Chasm: Autonomous Physician Extenders Will Necessitate a Shift to Enterprise Liability Coverage for Health Care Delivery

International audienc

The Schizophrenia of Physician Extender Utilization

The Patient Protection and Affordable Care Act of 2010 provides incentives for healthcare to be delivered by Affordable Care Organizations (ACOs). The public face of many, if not most, ACOs is likely to be the Patient Centered Medical Home (PCMHs), a business structure that evolved from Retail Medical Clinics, which made greater use of physician extenders (PAs). Accordingly, this paper examines the evolution and structure of PCMHs as well as how the PCMH is regulated. As neither legal or market regulatory mechanisms are ideal for policing business structures that employ PAs, this paper concludes that the tort reform most appropriate for PCMHs is the introduction of either no-fault or enterprise liability coverage