A5045438770- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Statistical and numerical algorithms
- Black Holes and Theoretical Physics
- Geophysics and Sensor Technology
- Radio Astronomy Observations and Technology
- Seismic Waves and Analysis
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Health Systems, Economic Evaluations, Quality of Life
- Jury Decision Making Processes
- Healthcare cost, quality, practices
- RFID technology advancements
- Sepsis Diagnosis and Treatment
- Ocean Waves and Remote Sensing
- Historical Geography and Cartography
- Private Equity and Venture Capital
- Scientific Research and Discoveries
- Advanced Differential Geometry Research
Massachusetts Institute of Technology
2024
Northwestern University
2007-2023
Washington University in St. Louis
2021-2023
Kenyon College
2017-2020
University of Oklahoma
2020
ABSTRACT Gravitational waves provide a unique tool for observational astronomy. While the first LIGO–Virgo catalogue of gravitational-wave transients (GWTC-1) contains 11 signals from black hole and neutron star binaries, number observations is increasing rapidly as detector sensitivity improves. To extract information observed signals, it imperative to have fast, flexible, scalable inference techniques. In previous paper, we introduced bilby: modular user-friendly Bayesian library adapted...
Abstract We study the population properties of merging binary black holes in second LIGO–Virgo Gravitational-Wave Transient Catalog assuming they were all formed dynamically gravitationally bound clusters. Using a phenomenological model, we infer mass and spin distribution first-generation holes, while self-consistently accounting for hierarchical mergers. Considering range cluster masses, see compelling evidence mergers clusters with escape velocities ≳100 km s −1 . For our most probable...
Observations of gravitational-wave signals from binary neutron-star mergers, like GW170817, can be used to constrain the equation state (EoS). One method involves modeling EoS and measuring model parameters through Bayesian inference. A previous study has demonstrated effectiveness using a phenomenologically parameterized piecewise polytrope extract constraining information simulated population mergers. Despite its advantages compared more traditional methods tidal deformability neutron...
Abstract The Universe is neither homogeneous nor isotropic, but it close enough that we can reasonably approximate as such on suitably large scales. inflationary-Λ-Cold Dark Matter (ΛCDM) concordance cosmology builds these assumptions to describe the origin and evolution of fluctuations. With standard about stress-energy sources, this system specified by just seven phenomenological parameters, whose precise relations underlying fundamental theories are complicated may depend details those...
Abstract. It is widely accepted that the atmospheric boundary layer drastically under-sampled in vertical dimension. In recent years, commercial availability of ground-based remote sensors combined with widespread use small, weather-sensing uncrewed aerial systems (WxUAS) has opened up many opportunities to fill this measurement gap. July 2018, University Oklahoma (OU) deployed a state-of-the-art WxUAS, dubbed CopterSonde, and Collaborative Lower Atmospheric Mobile Profiling System (CLAMPS)...
We introduce and study a new scheme to construct relativistic observables from post-processing light cone data. This construction is based on novel approach, LC-Metric, which takes general or snapshot output generated by arbitrary N-body simulations emulations solves the linearized Einstein equations determine spacetime metric cone. find that this able high precision, subsequently generate accurate mock cosmological observations sensitive effects such as post-Born lensing nonlinear ISW...
The curvature of a spacetime, either in topological sense, or averaged over superhorizon-sized patches, is often equated with the global term that appears Friedmann's equation. In general, however, Universe inhomogeneous, and gravity nonlinear theory, thus any perturbations violate assumptions Friedmann-Lema\"{\i}tre-Robertson-Walker model; it not necessarily true local curvature, patches constant-time surfaces, will reproduce observational effects symmetry. Further, hypersurface an...
We compute the expected response of detector arms gravitational wave observatories to polymerized waves. The mathematical and theoretical features these waves were discussed in our previous work. In present manuscript, we find both perturbative analytical, full nonperturbative numerical solutions equations motion using method geodesic deviations. These results show modifications frequency amplitude signal measured by detector. Furthermore, study detectability signals LISA analyzing modes space.
One of the greatest hindrances to safeguarding health is currency so- called "popular fallacies," or general belief in what plainly inconsistent with sound reasoning.The cleverness which some these fallacies are instilled into minds unwary such that deception occasionally extends those possessing more than a modicum training sciences.As matter fact, evil consequences have attained proportions it has been deemed expedient enlist aid respectable authority their uproot.It believed authors...
<h3>Background</h3> CD8<sup>+</sup> T cell fate decision refers to the differentiation of a naïve into effector, memory, exhausted, or other fates. Evidence from chronic infection and cancer models suggest that signals during priming are especially important in determining thus functional quality response.<sup>1–4</sup> Priming interactions highly complex, requiring integration multiple signals, each which varies strength duration. Thus, we currently do not comprehend combinatorial...
Abstract We present the first empirical constraints on polymer scale describing quantized GWs propagating a classical background. These are determined from polymer-induced deviation classically predicted propagation speed of GWs. leverage posterior information two previously reported sources: (1) inter-detector arrival time delays for signals LIGO-Virgo Collaboration’s gravitational-wave transient catalog, GWTC1, and (2) between GW signal GW170817 its associated gamma-ray burst GRB170817A....
The Universe is neither homogeneous nor isotropic, but it close enough that we can reasonably approximate as such on suitably large scales. inflationary-$Λ$-Cold Dark Matter ($Λ$CDM) concordance cosmology builds these assumptions to describe the origin and evolution of fluctuations. With standard about stress-energy sources, this system specified by just seven phenomenological parameters, whose precise relations underlying fundamental theories are complicated may depend details those fields....
The Asia Pacific Journal presents a link to an extraordinary 12-minute video by Matthew Carney of the Australian Broadcasting Corporation discussing death penalty and problem wrongful convictions in Japanese criminal justice. This explains what went wrong three cases involving men who were victimized worst kind way Japan's justice system, it raises possibility that these could stimulate reform system capital punishment more generally.
We present the first empirical constraints on polymer scale describing quantized GWs propagating a classical background. These are determined from polymer-induced deviation classically predicted propagation speed of GWs. leverage posterior information two previously reported sources: 1) inter-detector arrival time delays for signals LIGO-Virgo Collaboration's gravitational-wave transient catalog, GWTC1, and 2) between GW signal GW170817 its associated gamma-ray burst GRB170817A. For pure-GW...
We compute the expected response of detector arms gravitational wave observatories to polymerized waves. The mathematical and theoretical features these waves were discussed in our previous work. In present manuscript, we find both perturbative analytical, full nonperturbative numerical solutions equations motion using method geodesic deviations. These results show modifications frequency amplitude signal measured by detector. Furthermore, study detectability signals LISA analyzing modes space.