Étude S.AGES : recueil et suivi de nouveaux cas de syndromes d’apnées obstructives au cours du sommeil (SAOS), chez des sujets âgés de plus de 70 ans, diagnostiqués dans les structures de pneumologie et de gériatrie

RATIONALE: S.AGES is a prospective cohort of >70-years-old patients with obstructive sleep apnea syndrome having been diagnosed in a pulmonary or a geriatric medical unit. OBJECTIVES: The main objective of S.AGES is to get a description of older patients with OSAS in France. The secondary objectives will be to prospectively describe the management and the treatment of these patients, to describe their 5-years outcome as compared to younger patients in the literature. It will also contribute to better characterize the compliance and tolerance of the treatment and the incidence of comorbidities like respiratory diseases and cardiovascular disorders. METHODS: All consecutive≥70-years-old patients having received a diagnosis of OSAS (after polygraphy or polysomnography) will be included in the study. All patients will be followed in a pulmonary or a geriatric department. EXPECTED RESULTS: S.AGES should better characterize the OSAS in the elderly patients, the specific management of this disease and its related risk factors. It may also identify the 5-years mortality and morbidity rates in this population

Stock assessment of Queensland east coast dusky flathead (Platycephalus fuscus), Australia, with data to December 2020

In Queensland, dusky flathead (Platycephalus fuscus) are found in inshore waters of east coastal regions from south of Cairns to the New South Wales (NSW) border and targeted by commercial, charter and recreational fishers. Dusky flathead are a gonochore (born male or female and does not change sex) and spawn primarily in the summer months. Female dusky flathead grow much larger and live longer than males. For Queensland’s east coast, they generally attain maximum average length of 85 cm (total length) and live for 11 years. Dusky flathead are believed to be a single population on the east coast of Queensland. Eighteen scenarios were run to cover a range of modelling assumptions and sensitivity tests for the stock model. Base case (most plausible) results suggested that the dusky flathead biomass experienced a decline in the period of 1901–2000 to reach 30% unfished spawning biomass (Figure 3). At the beginning of 2021, the stock level was estimated to be 46% unfished biomass with the 95% confidence interval between 31% and 62%. The East coast inshore fishery harvest strategy: 2021–2026 identifies a target reference point (Btarg) of between 50 and 60 % for tier 2 species within the fishery which applies to dusky flathead (Fisheries Queensland (2021b)). This variation in biomass targets for tier 2 species recognises different biological and economic characteristics among target species in the fishery. The equilibrium yield curve produced as part of this assessment suggests that a 50 % target reference point would maintain the stock in a more productive state than a 60 % target, and is therefore likely to be the most reflective of MEY. The harvest consistent with maintaining a spawning biomass of 50% was estimated at 138 t and for rebuilding the stock back to 50% target, the assessment recommends a biological catch of 106 t for 2021. The harvest consistent with maintaining a spawning biomass of 60% was estimated at 112 t. For a 60% target, the assessment recommends a biological catch of 60 t for 2021(Table 1)

Impurity induced resonant state in a pseudogap state of a high temperature superconductor

We predict a resonance impurity state generated by the substitution of one Cu atom with a nonmagnetic atom, such as Zn, in the pseudogap state of a high-T_c superconductor. The precise microscopic origin of the pseudogap is not important for this state to be formed, in particular this resonance will be present even in the absence of superconducting fluctuations in the normal state. In the presence of superconducting fluctuations, we predict the existence of a counterpart impurity peak on a symmetric bias. The nature of impurity resonance is similar to the previously studied resonance in the d-wave superconducting state.Comment: 4 pages, 2 figure

How identifying circumgalactic gas by line-of-sight velocity instead of the location in 3D space affects O VI measurements

Galaxie

Power spectrum of many impurities in a d-wave superconductor

Recently the structure of the measured local density of states power spectrum of a small area of the \BSCCO (BSCCO) surface has been interpreted in terms of peaks at an "octet" of scattering wave vectors determined assuming weak, noninterfering scattering centers. Using analytical arguments and numerical solutions of the Bogoliubov-de Gennes equations, we discuss how the interference between many impurities in a d-wave superconductor alters this scenario. We propose that the peaks observed in the power spectrum are not the features identified in the simpler analyses, but rather "background" structures which disperse along with the octet vectors. We further consider how our results constrain the form of the actual disorder potential found in this material.Comment: 5 pages.2 figure

Warp propagation in astrophysical discs

Astrophysical discs are often warped, that is, their orbital planes change with radius. This occurs whenever there is a non-axisymmetric force acting on the disc, for example the Lense-Thirring precession induced by a misaligned spinning black hole, or the gravitational pull of a misaligned companion. Such misalignments appear to be generic in astrophysics. The wide range of systems that can harbour warped discs - protostars, X-ray binaries, tidal disruption events, quasars and others - allows for a rich variety in the disc's response. Here we review the basic physics of warped discs and its implications.Comment: To be published in Astrophysical Black Holes by Haardt et al., Lecture Notes in Physics, Springer 2015. 19 pages, 2 figure

Theory of Magnetic Field Induced Spin Density Wave in High Temperature Superconductors

The induction of spin density wave (SDW) and charge density wave (CDW) orderings in the mixed state of high $T_c$ superconductors (HTS) is investigated by using the self-consistent Bogoliubov-de Gennes equations based upon an effective model Hamiltonian with competing SDW and d-wave superconductivity interactions. For optimized doping sample, the modulation of the induced SDW and its associated CDW is determined by the vortex lattice and their patterns obey the four-fold symmetry. By deceasing doping level, both SDW and CDW show quasi-one dimensional like behavior, and the CDW has a period just half that of the SDW along one direction. From the calculation of the local density of states (LDOS), we found that the majority of the quasi-particles inside the vortex core are localized. All these results are consistent with several recent experiments on HTS

Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets

The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet–planet interactions. Instability around a single star requires a very compactly spaced planetary system. We find that around binary star systems instability can occur even with widely separated planets that are on tilted orbits relative to the binary orbit due to combined effects of planet–binary and planet–planet interactions, especially if the binary is on an eccentric orbit. We investigate the orbital stability of planetary systems with various planet masses and architectures. We find that the stability of the system depends upon the mass of the highest-mass planet. The order of the planets in the system does not significantly affect stability, but, generally, the most massive planet remains stable and the lower-mass planets are ejected. The minimum planet mass required to trigger the instability is about that of Neptune for a circular orbit binary and a super-Earth of about 10 Earth masses for highly eccentric binaries. Hence, we suggest that planet formation around inclined binaries can be an efficient formation mechanism for free-floating planets. While most observed free-floating planets are giant planets, we predict that there should be more low-mass free-floating planets that are as of yet unobserved than higher-mass planets