A5054643544- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Black Holes and Theoretical Physics
- SARS-CoV-2 and COVID-19 Research
- Solar and Space Plasma Dynamics
- Geophysics and Sensor Technology
- Geomagnetism and Paleomagnetism Studies
- Cosmology and Gravitation Theories
- Vaccine Coverage and Hesitancy
- COVID-19 epidemiological studies
- Cold Atom Physics and Bose-Einstein Condensates
- Geophysics and Gravity Measurements
- Respiratory viral infections research
- Dynamics and Control of Mechanical Systems
- Infection Control and Ventilation
- High-pressure geophysics and materials
- Noncommutative and Quantum Gravity Theories
- Astro and Planetary Science
- Elasticity and Wave Propagation
- Experimental and Theoretical Physics Studies
- Mechanics and Biomechanics Studies
- Fluid Dynamics Simulations and Interactions
- Immune responses and vaccinations
- Lung Cancer Diagnosis and Treatment
- Radio Astronomy Observations and Technology
Centre hospitalier de l'Université Laval
2024
Université Laval
2020-2024
Institut National de Santé Publique du Québec
2023-2024
Johns Hopkins University
2023
St. Michael's Hospital
2023
Health Solutions (Sweden)
2023
Université du Québec à Montréal
2023
Centre Hospitalier Universitaire Sainte-Justine
2022
McGill University
2022
Institut Universitaire de Cardiologie et de Pneumologie de Québec
2018
We analyze in detail the spin precession equations binary black hole systems, when tidal torque on a Kerr due to quadrupole-monopole coupling is taken into account. show that completing with this term reveals existence of conserved quantity at 2PN order averaging over orbital motion. This allows one solve (orbit-averaged) exactly case equal masses and arbitrary spins, neglecting radiation reaction. For unequal masses, an exact solution does not exist closed form, but we are still able derive...
Using a Legendre transformation, we compute the unconstrained Hamiltonian of spinning test particle in curved spacetime at linear order spin. The equations motion this coincide with Mathisson-Papapetrou-Pirani equations. We then use formalism Dirac brackets to derive constrained and corresponding phase space algebra Newton-Wigner spin supplementary condition, suitably generalized spacetime, find that $(\mathbf{q},\mathbf{p},\mathbf{S})$ is canonical provide explicit expressions for...
In this paper, we examine the mode of dynamo action in implicit large-eddy magnetohydrodynamical simulation solar convection reported upon Ghizaru et al. Motivated by presence a strong and well-defined large-scale axisymmetric magnetic component undergoing regular polarity reversals, define fluctuating field as difference between total its zonal average. The subsequent analysis follows physical logic mathematical formulation mean-field electrodynamics, whereby turbulent electromotive force...
We generalize the factorized resummation of multipolar waveforms introduced by Damour, Iyer and Nagar to spinning black holes. For a nonspinning test-particle spiraling Kerr hole in equatorial plane, we find that amplitudes which replace residual relativistic amplitude f_{l m} with its l-th root, ρ_{l = m}^{1/l}, agree quite well numerical up Kerr-spin value q \leq 0.95 for orbital velocities v 0.4. The are computed solving Teukolsky equation spectral code. agreement prograde orbits large...
In coalescing neutron star binaries, $r$-modes in one of the stars can be resonantly excited by gravitomagnetic tidal field its companion. This post-Newtonian driving these modes dominates over Newtonian previously computed Ho and Lai. To leading order expansion parameter $R/r$ (where $R$ is radius $r$ orbital separation), only $l=2$, $|m|=1$, $|m|=2$ are excited. The work done on through this has an effect evolution inspiral phasing emitted gravitational wave signal. For a mass $M$, $R$,...
Abstract Background High prostate eicosapentaenoic fatty acid (EPA) levels were associated with a significant reduction of upgrading to grade group (GG) ≥ 2 cancer in men under active surveillance. We aimed evaluate the effect MAG-EPA long-chain omega-3 dietary supplement on proliferation. Methods A phase II double-blind randomized placebo-controlled trial was conducted 130 diagnosed GG and undergoing radical prostatectomy between 2015–2017 (Clinicaltrials.gov: NCT02333435). Participants...
We compute the flux of linear momentum carried by gravitational waves emitted from spinning binary black holes at second post-Newtonian (2PN) order for generic orbits. In particular we provide explicit expressions three new types terms, namely, next-to-leading spin-orbit terms 1.5 (1.5PN) order, tail 2PN and spin-spin order. Restricting ourselves to quasicircular orbits, integrate linear-momentum over time obtain recoil velocity as function orbital frequency. find that in so-called superkick...
Understanding the immune response to natural infection by SARS-CoV-2 is key pandemic management, especially in current context of emerging variants. Uncertainty remains regarding efficacy and duration immunity against reinfection.We conducted an observational prospective cohort study Canadian healthcare workers (HCWs) with a history PCR-confirmed (i) measure average incidence rate reinfection (ii) describe serological primary infection.Our comprised 569 HCWs; median individual follow-up was...
We give a surface integral derivation of post-1-Newtonian translational equations motion for system arbitrarily structured bodies, including the coupling to all bodies' mass and current multipole moments. The requires only that vacuum field are satisfied in weak-field regions between bodies; internal gravity can be strong. extends previous results Damour, Soffel Xu (DSX) weakly self-gravitating bodies which everywhere. consists number steps: (i) definition each body's moments center-of-mass...
If the number of lattice sites is odd, a quantum particle hopping on bipartite with random between two sublattices only guaranteed to have an eigenstate at zero energy. We show that localization length this depends strongly boundaries lattice, and can take values anywhere mean free path infinity. The same dependence boundary conditions seen in conductance such if it connected electron reservoirs via narrow leads. For any nonzero energy, removed for sufficiently large system sizes.
Influenza and RSV are human viruses responsible for outbreaks in hospitals, long-term care facilities nursing homes. The present study assessed an air treatment using ozone at two relative humidity conditions (RHs) order to reduce the infectivity of airborne influenza. Bovine pulmonary surfactant (BPS) synthetic tracheal mucus (STM) were used as aerosols protectants better reflect aerosol composition. Residual concentration inside chamber was also measured. RSV's sensitivity resulted testing...
Data analysis for the proposed Laser Interferometer Space Antenna (LISA) will be complicated by huge number of sources in LISA band. In frequency band $\ensuremath{\sim}{10}^{\ensuremath{-}4}\ensuremath{-}2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}\text{ }\text{ }\mathrm{Hz}$, galactic white dwarf binaries (GWDBs) are sufficiently dense space that it impossible to resolve most them, and ``confusion noise'' from unresolved Galactic dominate over instrumental noise determining...
We study a non-dissipative hydrodynamical mechanism that can stabilize the spin of accretor in an ultracompact double white dwarf (WD) binary. This novel synchronization relies on non-linear coupling between tides and uniform (or rigid) rotation mode, which spins down background star. The essential physics is summarized as follows. As compact binary coalesces due to gravitational wave emission, largest star eventually fills its Roche lobe accretion starts. then up infalling material reaches...
Because of a lack official guidelines, systematic use intraoperative frozen section for the evaluation surgical margins in lung oncology constitutes standard practice many pathology departments. This costly and time-consuming procedure seems unjustified as reported rates positive remain low. We aimed to evaluate clinicopathologic criteria associated with establish evidence-based recommendations regarding sections. retrospective cohort included 1903 consecutive patients resection malignant...
In Canada, all provinces implemented vaccine passports in 2021 to reduce SARS-CoV-2 transmission non-essential indoor spaces and increase uptake (policies active September 2021-March 2022 Quebec Ontario). We sought evaluate the impact of passport policies on first-dose vaccination coverage by age, area-level income proportion racialized residents.We performed interrupted time series analyses using data from Quebec's Ontario's registries linked census information (population 20.5 million...
In 2019, the 3 + 1 schedule for children's vaccination (2–4–6–18 months old) was changed a reduced 2 (2–4–12 in Quebec, Canada. We compared post-booster anti-pertussis and anti-pneumococcus IgG antibody concentrations among children of Tdap-vaccinated unvaccinated mothers different vaccine schedules formulations. conducted an observational cohort study. An invitation letter to potential participants provided during routine visit. Children's blood samples were analyzed at 13 (2 schedule) or...
Background. We evaluated mRNA COVID–19 vaccine effectiveness (VE) for the XBB.1.5 formulation against hospitalizations among adults aged ≥60 years during a ten–month follow–up period. Methods. conducted test–negative case–control study using Quebec population–based administrative data. Specimens collected from individuals tested at an acute–care hospital October 2023 to August 2024 were considered test–positive cases if hospitalized COVID–19, or controls SARS–CoV–2. Vaccination was defined...
We give a surface integral derivation of the leading-order evolution equations for spin and energy relativistic body interacting with other bodies in post-Newtonian expansion scheme.The can be arbitrarily shaped strongly self-gravitating.The effects all mass current multipoles are taken into account.As part computation one 2PN potentials parametrizing metric is obtained.The formulae obtained here coincide those by Damour, Soffel Xu case weakly self-gravitating bodies.By combining an...
ABSTRACT Background Understanding the immune response to natural infection by SARS-CoV-2 is key pandemic management, especially in current context of emerging variants. Uncertainty remains regarding efficacy and duration immunity against reinfection. Method We conducted an observational prospective cohort study Canadian healthcare workers (HCWs) with a history PCR-confirmed : (i) measure average incidence rate reinfection (ii), describe serological primary infection. Results detected 5 cases...