27 research outputs found
Wiedemann-Franz law and abrupt change in conductivity across the pseudogap critical point of a cuprate superconductor
The thermal conductivity of the cuprate superconductor
LaNdSrCuO was measured down to 50 mK in seven
crystals with doping from to , both in the superconducting
state and in the magnetic field-induced normal state. We obtain the electronic
residual linear term as across the pseudogap critical
point . In the normal state, we observe an abrupt drop in
upon crossing below , consistent with a drop in carrier
density from to , the signature of the pseudogap phase inferred
from the Hall coefficient. A similar drop in is observed at ,
showing that the pseudogap critical point and its signatures are unaffected by
the magnetic field. In the normal state, the Wiedemann-Franz law,
, is obeyed at all dopings, including at the critical
point where the electrical resistivity is -linear down to . We conclude that the non-superconducting ground state of the pseudogap
phase at is a metal whose fermionic excitations carry heat and charge as
conventional electrons do.Comment: 10 pages, including Supplementary Materia
Evaluation of alternative respiratory syndromes for specific syndromic surveillance of influenza and respiratory syncytial virus: a time series analysis
<p>Abstract</p> <p>Background</p> <p>Syndromic surveillance is increasingly being evaluated for its potential for early warning of increased disease activity in the population. However, interpretation is hampered by the difficulty of attributing a causative pathogen. We described the temporal relationship between laboratory counts of influenza and respiratory syncytial virus (RSV) detection and alternative groupings of Emergency Department (ED) respiratory diagnoses.</p> <p>Methods</p> <p>ED and laboratory data were obtained for the south-eastern area of Sydney, NSW for the period 1 June 2001 - 1 December 2006. Counts of ED visits and laboratory confirmed positive RSV and influenza cases were aggregated by week. Semi-parametric generalized additive models (GAM) were used to determine the association between the incidence of RSV and influenza and the incidence of respiratory syndrome ED presentations while controlling for temporal confounders.</p> <p>Results</p> <p>For every additional RSV laboratory count, ED diagnoses of bronchiolitis increased by 3.1% (95%CI: 2.7%-3.5%) in the same week. For every additional influenza laboratory count, ED diagnoses of influenza-like illness increased by 4.7% (95%CI: 4.2%-5.2%) one week earlier.</p> <p>Conclusion</p> <p>In this study, large increases in ED diagnoses of bronchiolitis and influenza-like illness were independent and proxy indicators for RSV and influenza activity, respectively.</p
Value of syndromic surveillance within the Armed Forces for early warning during a dengue fever outbreak in French Guiana in 2006
<p>Abstract</p> <p>Background</p> <p>A dengue fever outbreak occured in French Guiana in 2006. The objectives were to study the value of a syndromic surveillance system set up within the armed forces, compared to the traditional clinical surveillance system during this outbreak, to highlight issues involved in comparing military and civilian surveillance systems and to discuss the interest of syndromic surveillance for public health response.</p> <p>Methods</p> <p>Military syndromic surveillance allows the surveillance of suspected dengue fever cases among the 3,000 armed forces personnel. Within the same population, clinical surveillance uses several definition criteria for dengue fever cases, depending on the epidemiological situation. Civilian laboratory surveillance allows the surveillance of biologically confirmed cases, within the 200,000 inhabitants.</p> <p>Results</p> <p>It was shown that syndromic surveillance detected the dengue fever outbreak several weeks before clinical surveillance, allowing quick and effective enhancement of vector control within the armed forces. Syndromic surveillance was also found to have detected the outbreak before civilian laboratory surveillance.</p> <p>Conclusion</p> <p>Military syndromic surveillance allowed an early warning for this outbreak to be issued, enabling a quicker public health response by the armed forces. Civilian surveillance system has since introduced syndromic surveillance as part of its surveillance strategy. This should enable quicker public health responses in the future.</p
Travelers With Cutaneous Leishmaniasis Cured Without Systemic Therapy
Guidelines recommend wound care and/or local therapy as first-line treatment for cutaneous leishmaniasis. An analysis of a referral treatment program in 135 travelers showed that this approach was feasible in 62% of patients, with positive outcome in 83% of evaluable patient
Implementation of sustainability in transport corridors An Anglo-Dutch comparison
Available from British Library Document Supply Centre-DSC:DXN010006 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo