2,290 research outputs found
How to conduct research in an independent hospice: practical tips and advice
Independent hospices can – and should aim to – participate in palliative care research, say Paul Perkins, Rebecca Day, Julie Hapeshi, Lorraine Dixon and Rudo Nyakuhwa, who give tips and advice based on their experience at Sue Ryder
How to conduct research in an independent hospice: practical tips and advice
Independent hospices can – and should aim to – participate in palliative care research, say Paul Perkins, Rebecca Day, Julie Hapeshi, Lorraine Dixon and Rudo Nyakuhwa, who give tips and advice based on their experience at Sue Ryder
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Anatomic Knowledge and Perceptions of the Adequacy of Anatomic Education Among Applicants to Orthopaedic Residency.
BackgroundThe time dedicated to the study of human anatomy within medical school curriculums has been substantially reduced. The effect of this on the knowledge of incoming orthopaedic trainees is unknown. The current study aimed to evaluate both the subjective perceptions and objective anatomic knowledge of fourth-year medical students applying for orthopaedic residency.MethodsA multicenter prospective study was performed that assessed 224 students during the course of their interview day for an orthopaedic residency. Participants provided demographic data and a subjective assessment of the quality of their anatomic education, and completed either an upper or lower extremity anatomic examination. Mean total scores and subscores for various anatomic regions and concepts were calculated.ResultsStudents on average rated the adequacy of their anatomic education as 6.5 on a 10-point scale. Similarly, they rated the level of importance their medical school placed on anatomic education as 6.2 on a 10-point scale. Almost 90% rated the time dedicated to anatomy as good or fair. Of six possible methods for learning anatomy, dissection was rated the highest.On objective examinations, the mean score for correct answers was 44.2%. This improved to 56.4% when correct and acceptable answers were considered. Regardless of anatomic regions or concepts evaluated, percent correct scores did not reach 50%. There were no significant correlations between performance on the anatomic examinations and either prior academic performance measures or the student's subjective assessment of their anatomic education.ConclusionsCurrent students applying into orthopaedic residency do not appear to be adequately prepared with the prerequisite anatomic knowledge. These deficits must be explicitly addressed during residency training to produce competent, safe orthopaedic surgeons
Excluded volume effects on the structure of a linear polymer under shear flow
The effect of excluded volume interactions on the structure of a polymer in
shear flow is investigated by Brownian Dynamics simulations for chains with
size . The main results concern the structure factor of chains of N=300 Kuhn segments, observed at a reduced shear rate
, where is the bare shear rate and
is the longest relaxation time of the chain. At low q, where anisotropic
global deformation is probed, the chain form factor is shown to match the form
factor of the continuous Rouse model under shear at the same reduced shear
rate, computed here for the first time in a wide range of wave vectors. At high
q, the chain structure factor evolves towards the isotropic equilibrium power
law typical of self-avoiding walk statistics. The matching between
excluded volume and ideal chains at small q, and the excluded volume power law
behavior at large q are observed for orthogonal to the main
elongation axis but not yet for along the elongation direction
itself, as a result of interferences with finite extensibility effects. Our
simulations support the existence of anisotropic shear blobs for polymers in
good solvent under shear flow for provided chains are sufficiently
long.Comment: 36 pages, 11 figures, submitted to J. Chem. Phy
Satellite Navigation for the Age of Autonomy
Global Navigation Satellite Systems (GNSS) brought navigation to the masses.
Coupled with smartphones, the blue dot in the palm of our hands has forever
changed the way we interact with the world. Looking forward, cyber-physical
systems such as self-driving cars and aerial mobility are pushing the limits of
what localization technologies including GNSS can provide. This autonomous
revolution requires a solution that supports safety-critical operation,
centimeter positioning, and cyber-security for millions of users. To meet these
demands, we propose a navigation service from Low Earth Orbiting (LEO)
satellites which deliver precision in-part through faster motion, higher power
signals for added robustness to interference, constellation autonomous
integrity monitoring for integrity, and encryption / authentication for
resistance to spoofing attacks. This paradigm is enabled by the 'New Space'
movement, where highly capable satellites and components are now built on
assembly lines and launch costs have decreased by more than tenfold. Such a
ubiquitous positioning service enables a consistent and secure standard where
trustworthy information can be validated and shared, extending the electronic
horizon from sensor line of sight to an entire city. This enables the
situational awareness needed for true safe operation to support autonomy at
scale.Comment: 11 pages, 8 figures, 2020 IEEE/ION Position, Location and Navigation
Symposium (PLANS
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