2,366 research outputs found
Charging Spectrum of a Small Wigner Crystal Island
Charging of a clean two-dimensional island is studied in the regime of small
concentration of electrons when they form the Wigner crystal. The number of
electrons in the island is assumed to be not too big (N < 100). It is shown
that the total energy of the island as a function of N has a quasi-periodic
component of a universal shape, that is independent of the form of
electron-electron interactions. These oscillations are caused by the
combination of the geometric effects associated with packing of the triangular
lattice into the circular island. These effects are: the shell effect,
associated with starting a new crystalline row, and the so-called confinement
polaronic effect. In the presence of close metallic gates, which eliminate the
long-range part of the electron-electron interactions, the oscillations of the
energy bring about simultaneous entering of the dot by a few electrons.Comment: 8 pages, Latex, 8 Postscript pages are include
Transgender Healthcare Teaching in the Undergraduate Medical School Curriculum
With increasing recognition of the diverse and specific needs of transgender individuals in a health care setting, lack of knowledge, poor attitudes and prejudice towards transgender patients can result in this population being afraid to access medical care. Educating medical students early in their career in a sensitive and inclusive manner could help change these attitudes. It has been shown that medical undergraduates and post-graduates often feel unprepared or uncomfortable in caring for transgender patients due to lack of training and experience2-4. The aim of this study was to address this through introduction of basic transgender healthcare education into the University of Glasgow undergraduate medical curriculum, with the goal of implementing further interactive and fully inclusive teaching
Theology at the coal-face of hospitalisation - the development and evaluation of a postgraduate certificate in Healthcare Chaplaincy
Healthcare chaplaincy is working towards recognition as a registered health profession. An accredited programme of professional education is part of that process. The University of Glasgow supported by NHS Education for Scotland have developed a programme of professional education for healthcare chaplains that is integrated into an MSc. (MedSci) in healthcare. This article outlines the commissioning, development and evaluation of a postgraduate certificate in healthcare chaplaincy by students, clinical mentors and experienced healthcare chaplains. It also highlights an innovative approach to practice development in spiritual and religious care in healthcare
Electron correlations in two-dimensional small quantum dots
We consider circular and elliptic quantum dots with parabolic external
confinement, containing 0 - 22 electrons and with values of r_s in the range 0
< r_s < 3. We perform restricted and unrestricted Hartree-Fock calculations,
and further take into account electron correlations using second-order
perturbation theory. We demonstrate that in many cases correlations
qualitatively change the spin structure of the ground state from that obtained
under Hartree-Fock and spin-density-functional calculations. In some cases the
correlation effects destroy Hund's rule. We also demonstrate that the
correlations destroy static spin-density waves observed in Hartree-Fock and
spin-density-functional calculations.Comment: 11 pages, 9 figures. This replacement contains new content. Results
have been recalculated for dots with zero effective thickness (true 2D). For
6 electrons, results have been compared with configuration interaction
results from the literatur
Elastic contact to a coated half-space - Effective elastic modulus and real penetration
A new approach to the contact to coated elastic materials is presented. A
relatively simple numerical algorithm based on an exact integral formulation of
the elastic contact of an axisymmetric indenter to a coated substrate is
detailed. It provides contact force and penetration as a function of the
contact radius. Computations were carried out for substrate to layer moduli
ratios ranging from 0.01 to 100 and various indenter shapes. Computed
equivalent moduli showed good agreement with the Gao model for mismatch ratios
ranging from 0.5 to 2. Beyond this range, substantial effects of inhomogeneous
strain istribution are evidenced. An empirical function is proposed to fit the
equivalent modulus. More importantly, if the indenter is not flat-ended, the
simple relation between contact radius and penetration valid for homogeneous
substrates breaks down. If neglected, this phenomenon leads to significant
errors in the evaluation of the contact radius in depth-sensing indentation on
coated substrates with large elastic modulus mismatch
Effective velocity boundary condition at a mixed slip surface
This paper studies the nature of the effective velocity boundary conditions
for liquid flow over a plane boundary on which small free-slip islands are
randomly distributed. It is found that, to lowest order in the area fraction
covered by free-slip regions with characteristic size , a
macroscopic Navier-type slip condition emerges with a slip length of the order
of . The study is motivated by recent experiments which suggest that
gas nano-bubbles may form on solid walls and may be responsible for the
appearance of a partial slip boundary conditions for liquid flow. The results
are also relevant for ultra-hydrophobic surfaces exploiting the so-called
``lotus effect''.Comment: 14 pages, 1 figur
Automated Monitoring of Foraging Behaviour in Free Ranging Sheep Grazing a Bio-diverse Pasture using Audio and Video Information
Non-invasive methods for monitoring foraging choice in free ranging grazing animals are largely limited to accelerometers and video calibration. Acoustic data from a wireless microphone attached to the skull has been used to distinguish between resting and feeding bouts in free ranging cattle, sheep and goats. Similar data has been reported in restrained sheep presented with forage of differing dry matter content. We take these approaches further by using a small video camera attached to a halter in free range sheep, and software developed specifically for the analysis of animal sounds. Combined biting and mastication sounds allowed us to distinguish between foraged grasses and browsing activity, and non-foraging chewing activity in four sheep of differing body size and breed in the height of a UK summer for up to 8 hours
Automated monitoring of foraging behaviour in free-range sheep grazing a biodiverse pasture
Little is currently known about the foraging behavior of free ranging animals, particularly in biodiverse pastures. This is despite the suggestion of recent work that animals grazing on such pastures tend to produce better quality meat. This paper presents a bespoke Wireless Sensor Network system designed to be mounted on grazing animals and collect movement information which is then coded with reference to human observations. In doing this it has been possible to calibrate the bespoke system such that, in realtime, the system can be used to deduce animal behavior (e.g. resting, grazing, foraging, etc.) remotely. When coupled with future GPS-free positional information, this system will provide valuable information for the UK agricultural industry, in addition to overcoming the challenges faced by many commercial systems which rely on energy intensive GPS technology. Keywords- Behaviour monitoring, wireless sensor networks, tracking, location, accelerometer, animal grazing, biodiverse pasture
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