14,189 research outputs found
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3-D pain drawings-mobile data collection using a PDA
A large number of the adult population suffers from some kind of back pain during their lifetime. Part of the process of diagnosing and treating such back pain is for a clinician to
collect information as to the type and location of the pain that is being suffered.Traditional approaches to gathering and visualizing this pain data have relied on simple 2-D representations of the human body, where different types of sensation are recorded with various monochrome symbols. Although patients have been shown to prefer such drawings to traditional questionnaires, these pain drawings can be limited in their ability to accurately record pain. The work described in this paper proposes an alternative that uses a 3-D representation of the human body, which can be marked in color to visualize and record the pain data. This study has shown that the new approach is a promising development in this area of medical practice and has been positively received by patients and clinicians alike
Motion of Vacancies in a Pinned Vortex Lattice: Origin of the Hall Anomaly
Physical arguments are presented to show that the Hall anomaly is an effect
of the vortex many-body correlation rather than that of an individual vortex.
Quantitatively, the characteristic energy scale in the problem, the vortex
vacancy formation energy, is obtained for thin films. At low temperatures a
scaling relation between the Hall and longitudinal resistivities is found, with
the power depending on sample details. Near the superconducting transition
temperature and for small magnetic fields the Hall conductivity is found to be
proportional to the inverse of the magnetic field and to the quadratic of the
difference between the measured and the transition temperatures.Comment: minor change
Two Stages in the evolution of binary alkali Bose-Einstein condensate mixtures towards phase segregation
Two stages of quantum spinodal decomposition is proposed and analyzed for
this highly non-equilibrium process. Both time and spatial scales for the
process are found. Qualitative agreement with existing data is found. Some
cases the agreements are quantitative. Further experimental verifications are
indicated.Comment: late
Internal Vortex Structure of a Trapped Spinor Bose-Einstein Condensate
The internal vortex structure of a trapped spin-1 Bose-Einstein condensate is
investigated. It is shown that it has a variety of configurations depending on,
in particular, the ratio of the relevant scattering lengths and the total
magnetization.Comment: replacement; minor grammatical corrections but with additional
figure
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Temperature Stabilisation in Fischer-Tropsch Reactors Using Phase Change Material (PCM)
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute, ASME Press, LCN London Centre for Nanotechnology, UCL University College London, UCL Engineering, the International NanoScience Community, www.nanopaprika.eu.The Fischer-Tropsch (FT) reaction is a highly exothermic reaction. The high exothermicity
combined with a high sensitivity of product selectivity to temperature, constitute the main challenges in the
design of FT reactors. The use of micro-encapsulated- Phase Change Material (PCM) in conjunction with the
supervisory temperature control mechanism has been suggested as an effective way of mitigating these
challenges. A 2-dimensional, pseudo-homogeneous, steady-state model, with the dissipation of the enthalpy
of reaction into an isothermal PCM sink, in a fixed bed reactor is presented. Effective temperature control
with the PCM shows a shift in thermodynamic equilibrium favouring the selectivity of C5 to the
disadvantage of CH4 selectivity - a much desired outcome in the hydrocarbon Gas-to-Liquid industry
Term quadruplet pregnancy: a case report
Higher order multiple pregnancies are rare and often associated with complications. Term delivery is uncommon. This is a report of a 22 years old G3 p2 + 0 (1 alive) teacher who had quadruplet pregnancy following ovulation induction is presented. She had elective caesarean section at term with the delivery of two live male and two live female infants with birth weights ranging between 1750gram and 2850grams. Term delivery in quadruplet pregnancy is possible as demonstrated in this case, and has the advantage of improved perinatal outcome. Bed rest early detection and management of antenatal complications, and planned elective delivery are probably the keys to a successful outcome
Idealized Slab Plasma approach for the study of Warm Dense Matter
Recently, warm dense matter (WDM) has emerged as an interdisciplinary field
that draws increasing interest in plasma physics, condensed matter physics,
high pressure science, astrophysics, inertial confinement fusion, as well as
materials science under extreme conditions. To allow the study of well-defined
WDM states, we have introduced the concept of idealized-slab plasmas that can
be realized in the laboratory via (i) the isochoric heating of a solid and (ii)
the propagation of a shock wave in a solid. The application of this concept
provides new means for probing the dynamic conductivity, equation of state,
ionization and opacity. These approaches are presented here using results
derived from first-principles (density-functional type) theory, Thomas-Fermi
type theory, and numerical simulations.Comment: 37 pages, 21 figures, available, pdf file only. To appear in: Laser
and Particle beams. To appear more or less in this form in Laser and Particle
beam
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