1,273 research outputs found
Can excessive wear of ceramic bearing couples be a consequence of hip squeaking?
The occurrence of Ceramic-on‐Ceramic hip squeaking in some patients is a cause for concern. Friction was shown the main reason of hip squeaking. Moreover, hip vibration significantly altered contact point path during
the gait cycle. This study investigated the effect of hip squeaking on hip implant wear
National economic development and tropical deforestation in the Brazilian Amazon
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1987.Title as it appeared in the Massachusetts Institute of Technology Gradute List, June 1987: Tropical deforestation and national economic development.Bibliography: leaves 82-83.by Moana R. Appleyard.M.C.P
Spin-dependent thermoelectric transport coefficients in near-perfect quantum wires
Thermoelectric transport coefficients are determined for semiconductor
quantum wires with weak thickness fluctuations. Such systems exhibit anomalies
in conductance near 1/4 and 3/4 of 2e^2/h on the rising edge to the first
conductance plateau, explained by singlet and triplet resonances of conducting
electrons with a single weakly bound electron in the wire [T. Rejec, A. Ramsak,
and J.H. Jefferson, Phys. Rev. B 62, 12985 (2000)]. We extend this work to
study the Seebeck thermopower coefficient and linear thermal conductance within
the framework of the Landauer-Buettiker formalism, which also exhibit anomalous
structures. These features are generic and robust, surviving to temperatures of
a few degrees. It is shown quantitatively how at elevated temperatures thermal
conductance progressively deviates from the Wiedemann-Franz law.Comment: To appear in Phys. Rev. B 2002; 3 figure
Zero field Wigner crystal
A candidate for the insulating phase of the 2D electron gas, seen in high
mobility 2D MOSFETS and heterojunctions, is a Wigner crystal pinned by the
incipient disorder. With this in view, we study the effect of collective
pinning on the physical properties of the crystal formed in zero external
magnetic field. We use an elastic theory to describe to long wavelength modes
of the crystal. The disorder is treated using the standard Gaussian variational
method. We calculate various physical properties of the system with particular
emphasis on their density dependence. We revisit the problem of compressibility
in this system and present results for the compressibility obtained via
effective capacitance measurements in experiments using bilayers. We present
results for the dynamical conductivity, surface acoustic wave anomalies and the
power radiated by the crystal through phonon emission at finite temperatures.Comment: 14 pages, 4 figure
Shot noise reduction in quantum wires with "0.7 structure"
Shot noise reduction in quantum wires is interpreted within the model for the
''0.7 structure'' in the conductance of near perfect quantum wires [T. Rejec,
A. Ramsak, and J.H. Jefferson, Phys. Rev. B 62, 12985 (2000)]. It is shown how
the Fano factor structure is related to the specific structure of the
conductance as a consequence of the singlet--triplet nature of the resonances
with the probability ratio 1:3. An additional feature in the Fano factor,
related to the ''0.25 structure'' in conductance, is predicted.Comment: minor changes; to appear in Phys. Rev. B, Rapid. Comm. (2005
A short report examining the introduction of routine use of patient reported outcome measures in a mixed oncology population
Aims:
People living with treatable but not curable cancer often experience a range of symptoms related to their cancer and its treatment. During the COVID-19 pandemic, face-to-face consultations were reduced and so remote monitoring of these needs was necessary. University Hospitals Sussex implemented the routine use of electronic remote patient-reported outcome measures (PROMs) in a mixed oncology population, focusing on those with treatable but not curable cancers.
Materials and methods:
Over a 9-month period, patients were invited to register with My Clinical Outcomes (MCO) – a secure online platform for the collection of electronic PROMs. They were prompted by e-mail to complete assessments (EORTC QLQ-C30, EQ-5D-3L and EQ-5D VAS) routinely every 2 weeks. The team monitored patient scores and changes in these prompted clinical interventions.
Results:
In total, 324 patients completed at least one assessment. The median number of assessments completed by each patient was eight. The most represented tumour groups were secondary breast (28%), prostate (25%) and other (32%). Median scores for the assessments did not deteriorate in a clinically or numerically significant way for patients living with non-curable conditions for the majority of patients monitored.
Conclusion:
Routine collection of electronic remote PROMs is an effective and useful strategy to provide real-time clinical feedback to teams. With integration into existing systems, online platforms (such as MCO) could provide efficient and patient-centred information for those providing care for people with cancer
- …