Magnetic dephasing in mesoscopic spin glasses

We have measured Universal Conductance Fluctuations in the metallic spin glass Ag:Mn as a function of temperature and magnetic field. From this measurement, we can access the phase coherence time of the electrons in the spin glass. We show that this phase coherence time increases with both the inverse of the temperature and the magnetic field. From this we deduce that decoherence mechanisms are still active even deep in the spin glass phase

Giberville – La Delle de Derrière l’Église

Date de l'opération : 2007 (FP) Inventeur(s) : Carpentier Vincent (INRAP) ; Lespez Laurent (CNRS) Les vestiges formant le site gallo-romain de la « Delle de Derrière l’Église » ont été mis en évidence au cours d’un diagnostic conduit par Benjamin Hérard (INRAP) en janvier 2005, dans l’emprise d’un projet de lotissement développé par la société SEPRODIM EDIFIDES sur la commune de Giberville, au nord-est de la périphérie caennaise. La surface couverte par ce projet avoisine quelque 2 ha, au pie..

Giberville – La Delle de Derrière l’Église

Date de l'opération : 2007 (FP) Inventeur(s) : Carpentier Vincent (INRAP) ; Lespez Laurent (CNRS) Les vestiges formant le site gallo-romain de la « Delle de Derrière l’Église » ont été mis en évidence au cours d’un diagnostic conduit par Benjamin Hérard (INRAP) en janvier 2005, dans l’emprise d’un projet de lotissement développé par la société SEPRODIM EDIFIDES sur la commune de Giberville, au nord-est de la périphérie caennaise. La surface couverte par ce projet avoisine quelque 2 ha, au pie..

Drug squads: units specialised in drug law enforcement in Europe.

Drug law enforcement activity targets the supply of drugs and is responsible for much of the key data that informs our understanding of drugs supply in Europe. This study looks, for the first time, at how drug law enforcement is organised in European countries. Table of contents: • Key findings • Introduction • Background, objectives and methods • Key figures and institutional affiliations • Mandates and supervision • Conclusions • References • Annex • Acknowledgement

Optimization methodology of composite panels

This paper deals with mass optimisation of composite laminates aeronautical structures. It focuses on the final stage of the process of composite structure design i.e. defining the lay-up evolution all over the panel, this being directly used for manufacturing. Strength criteria (in-plane behaviour) and stability criteria (out-of-plane behaviour) performed with appropriate industrial tools are evaluated in the multi-level optimisation presented hereafter. The methodology consists in five steps. In the first two steps, optimisation is performed with continuous variables and a homogenized material (i.e. with approached out of plane properties). In the third step, a lay-up table is selected (or built) and translated into a "continuous" material (i.e. out of plane stiffnesses expressed as continuous variables of the lay-up thickness). In the fourth step, optimisation is performed with the "continuous" material. In the last step, a genetic optimisation is used to round off at discrete ply thicknesses. This methodology provides a manufacturable result (in terms of ply continuity) that satisfies all stress and stacking sequence constraints

Topological surface states of strained Mercury-Telluride probed by ARPES

The topological surface states of strained HgTe have been measured using high-resolution ARPES measurements. The dispersion of surface states form a Dirac cone, which origin is close to the top of the \ghh band: the top half of the Dirac cone is inside the stress-gap while the bottom half lies within the heavy hole bands and keeps a linear dispersion all the way to the X-point. The circular dichroism of the photo-emitted electron intensity has also been measured for all the bands.Comment: with supplementary materia

Navigating the heavy seas of online publishing:Reflections on ten years editorship

Articulo – Journal of Urban Research celebrates its 10th anniversary! To celebrate this milestone, the current editors discuss the numerous changes and challenges related to publishing a peer-reviewed online journal. Since 2005, Articulo has progressively become more international, more professional, and more specialized than its initiators ever dreamed it could be. In ten years, the rather confidential publication has progressively become a journal read by 9,000 people every month. Our editors, who used to work side by side, now live 6,000 km apart. In the midst of often tumultuous change, what hasn't changed is our commitment to the highest quality of publication and our conviction that knowledge – especially if funded by public money – should be universally and freely accessible. Rigorous peer-review and open access are the two principles on which the journal will navigate the often rough seas of online publishing in the future

Exploring the Redox Properties of Bench-Stable Uranyl(VI) Diamido–Dipyrrin Complexes

[Image: see text] The uranyl complexes UO(2)(OAc)(L) and UO(2)Cl(L) of the redox-active, acyclic diamido–dipyrrin anion L(–) are reported and their redox properties explored. Because of the inert nature of the complexes toward hydrolysis and oxidation, synthesis of both the ligands and complexes was conducted under ambient conditions. Voltammetric, electron paramagnetic resonance spectroscopy, and density functional theory studies show that one-electron chemical reduction by the reagent CoCp(2) leads to the formation of a dipyrrin radical for both complexes [Cp(2)Co][UO(2)(OAc)(L(•))] and [Cp(2)Co][UO(2)Cl(L(•))]

Local hyperhemia to heating is impaired in secondary Raynaud's phenomenon

Accurate and sensitive measurement techniques are a key issue in the quantification of the microvascular and endothelial dysfunction in systemic sclerosis (SSc). Thermal hyperhemia comprises two separate mechanisms: an initial peak that is axon reflex mediated; and a sustained plateau phase that is nitric oxide dependent. The main objective of our study was to test whether thermal hyperhemia in patients with SSc differed from that in patients with primary Raynaud's phenomenon (RP) and healthy controls. In a first study, we enrolled 20 patients suffering from SSc, 20 patients with primary RP and 20 healthy volunteers. All subjects were in a fasting state. Post-occlusive hyperhemia, 0.4 mg sublingual nitroglycerin challenge and thermal hyperhemia were performed using laser Doppler flowmetry on the distal pad of the third left finger. In a second study, thermal hyperhemia was performed in 10 patients with rheumatoid arthritis and 10 patients with primary RP. The thermal hyperhemia was dramatically altered in terms of amplitude and kinetics in patients with SSc. Whereas 19 healthy volunteers and 18 patients with primary RP exhibited the classic response, including an initial peak within the first 10 minutes followed by a nadir and a second peak, this occurred only in four of the SSc patients (p < 0.0001). The 10 minutes thermal peak was 43.4 (23.2 to 63), 42.6 (31 to 80.7) and 27 (14.7 to 51.4) mV/mm Hg in the healthy volunteers, primary RP and SSc groups, respectively (p = 0.01), while the 44°C thermal peak was 43.1 (21.3 to 62.1), 42.6 (31.6 to 74.3) and 25.4 (15 to 52.4) mV/mm Hg, respectively (p = 0.01). Thermal hyperhemia was more sensitive and specific than post-occlusive hyperhemia for differentiating SSc from primary RP. In patients with rheumatoid arthritis, thermal hyperhemia was also altered in terms of amplitude. Thermal hyperhemia is dramatically altered in patients with secondary RP in comparison with subjects with primary RP. Further studies are required to determine the mechanisms of this altered response, and whether it may provide additional information in a clinical setting

Image-derived input function in dynamic human PET/CT: methodology and validation with 11C-acetate and 18F-fluorothioheptadecanoic acid in muscle and 18F-fluorodeoxyglucose in brain

International audienc