Edward Seidel
University of Wyoming, Physics & Astronomy, Faculty Member
- President, University of Wyoming Formerly: VP for Economic Development, VP for Research, Director, National Center fo... morePresident, University of Wyoming
Formerly:
VP for Economic Development, VP for Research, Director, National Center for Supercomputing Applications (NCSA), Founder Professor, Dept of Physics, University of Illinois, Urbana, Illinois
Senior VP for Research and Innovation, Skolkovo Institute for Science and Technology, Moscow, Russia
NSF Assistant Director, Mathematical and Physical Sciences, Director, Office of Cyberinfrastructure, National Science Foundation, Arlington, VA
Director, Center for Computation and Technology, Floating Point Systems Professor, Dept of Physics and Astronomy, Dept of Computer Science, Louisiana State University, Baton Rouge, Louisiana
Max Planck Institute for Gravitational Physics (Albert-Einstein-Institut), Potsdam, Germany
University of Illinois
Washington University
Yale Universityedit - Vincent Moncrief, Dept of Physics, Dept of Mathematics, Yale Universityedit
Globally distributed scientific teams, linked to the most powerful supercomputers, are running visual simulations of Einstein's equations on the gravitational effects of colliding black holes.
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We discuss our numerical models of neutron star mergers and coalesence. These models have been carried out with a 3-D numerical Newtonian hydrodynamics code. We discuss the numerical methods employed by this code and will present several... more
We discuss our numerical models of neutron star mergers and coalesence. These models have been carried out with a 3-D numerical Newtonian hydrodynamics code. We discuss the numerical methods employed by this code and will present several models of collisions of neutron stars. We will also discuss the gravitational radiation signal emitted by these collsions which can be calculated via the quadrapole emission formula. Finally we will discuss the questions of angular momemtum and energy loss in Newtonian calculations as well as Post-Newtonian corrections to our calculations.
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Computational Frameworks, supporting multiple algorithms and applications with common parallel, I/O, and other computational routines, can provide an excellent substrate for application-scale benchmarks. Such benchmarks are essential for... more
Computational Frameworks, supporting multiple algorithms and applications with common parallel, I/O, and other computational routines, can provide an excellent substrate for application-scale benchmarks. Such benchmarks are essential for estimating the effective performance of HPC systems for the purpose of system procurements. Cactus is extremely portable and its modularity supports a variety of communication substrates and numerical methods — offering wide-coverage of the HPC applications domain.
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Research Interests: Oceanography, Physics, Gravitation, Nonlinear dynamics, Astrophysics, and 15 moreMedicine, Instrumentation, Gravitational Waves, Cosmology, Instability, Physical sciences, APS, Maximum a Posteriori, Gravity Waves, Stars, Spectral Indices, Astronomy and Astrophysics, Amplitude, gravitational wave, and neutron star
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Research Interests: Computer Science, Distributed Computing, Grid Computing, Data Analysis, Close relationships, and 15 moreParallel and Distributed Computing, Information Service, Data Access, Industrial Application, High performance, Grid, Lessons Learned, Scalability, Parallel Computer, Genome sequence, Large Scale, High performance computer, Large Scale Simulation, Computational Method, and Springer Ebooks
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... AGE CORE HELIUM BURNING STARS AND THE DISTANCE TO THE MAGELLANIC CLOUDS E. SEIDEL, GS DA COSTA, AND PIERRE DEMARQUE Yale ... The four SMC objects are, in order of increasing age, NGC 41 1 (Da Costa and Mould 1986), Lindsay 1 13... more
... AGE CORE HELIUM BURNING STARS AND THE DISTANCE TO THE MAGELLANIC CLOUDS E. SEIDEL, GS DA COSTA, AND PIERRE DEMARQUE Yale ... The four SMC objects are, in order of increasing age, NGC 41 1 (Da Costa and Mould 1986), Lindsay 1 13 (Mould, Da ...
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Louisiana researchers and universities are leading a concentrated, collaborative effort to advance statewide e-Research through a new cyberinfrastructure: computing systems, data storage systems, advanced instruments and data... more
Louisiana researchers and universities are leading a concentrated, collaborative effort to advance statewide e-Research through a new cyberinfrastructure: computing systems, data storage systems, advanced instruments and data repositories, visualization environments and people, all linked together by software programs and high-performance networks. This effort has led to a set of interlinked projects that have started making a significant difference in the state, and has created an environment that encourages increased collaboration, leading to new e-Research. This paper describes the overall effort, the new projects and environment and the results to date.
Research Interests: Biochemistry, Computer Science, Chemistry, Cybernetics, Collaboration, and 15 moreLife Sciences, E Science, Medicine, Multidisciplinary, Data Science, Articles, Computer Systems, Cyberinfrastructure, Louisiana, e Research, Computer communication networks, Optical Fibers, Fiber Optic Technology, Cooperative Behavior, and Internet
Over the last 20 years, the open-source community has provided more and more software on which the world’s high-performance computing systems depend for performance and productivity. The community has invested millions of dollars and... more
Over the last 20 years, the open-source community has provided more and more software on which the world’s high-performance computing systems depend for performance and productivity. The community has invested millions of dollars and years of effort to build key components. However, although the investments in these separate software elements have been tremendously valuable, a great deal of productivity has also been lost because of the lack of planning, coordination, and key integration of technologies necessary to make them work together smoothly and efficiently, both within individual petascale systems and between different systems. It seems clear that this completely uncoordinated development model will not provide the software needed to support the unprecedented parallelism required for peta/ exascale computation on millions of cores, or the flexibility required to exploit new hardware models and features, such as transactional memory, speculative execution, and graphics proces...
Research Interests: Computer Science, Distributed Computing, High Performance Computing, High Performance Computing Applications development for Atmosphere modeling, Transactional Memory, and 10 moreOpen Source, Software, Flexibility in engineering design, Speculative Execution, High, Exascale Computing, Exploit, High performance computer, J, and graphic processing unit (GPU)
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We report on the population of 47 compact binary mergers detected with a false-alarm rate of < in the second LIGO–Virgo Gravitational-Wave Transient Catalog. We observe several characteristics of the merging binary black hole (BBH)... more
We report on the population of 47 compact binary mergers detected with a false-alarm rate of < in the second LIGO–Virgo Gravitational-Wave Transient Catalog. We observe several characteristics of the merging binary black hole (BBH) population not discernible until now. First, the primary mass spectrum contains structure beyond a power law with a sharp high-mass cutoff; it is more consistent with a broken power law with a break at or a power law with a Gaussian feature peaking at (90% credible interval). While the primary mass distribution must extend to or beyond, only of systems have primary masses greater than . Second, we find that a fraction of BBH systems have component spins misaligned with the orbital angular momentum, giving rise to precession of the orbital plane. Moreover, %– % of BBH systems have spins tilted by more than 90°, giving rise to a negative effective inspiral spin parameter, . Under the assumption that such systems can only be formed by dynamical interacti...
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Advanced LIGO’s second observing run (O2), conducted from 2016 November 30 to 2017 August 25, combined with Advanced Virgo’s first observations in 2017 August, witnessed the birth of gravitational-wave multimessenger astronomy. The first... more
Advanced LIGO’s second observing run (O2), conducted from 2016 November 30 to 2017 August 25, combined with Advanced Virgo’s first observations in 2017 August, witnessed the birth of gravitational-wave multimessenger astronomy. The first ever gravitational-wave detection from the coalescence of two neutron stars, GW170817, and its gamma-ray counterpart, GRB 170817A, led to an electromagnetic follow-up of the event at an unprecedented scale. Several teams from across the world searched for EM/neutrino counterparts to GW170817, paving the way for the discovery of optical, X-ray, and radio counterparts. In this article, we describe the online identification of gravitational-wave transients and the distribution of gravitational-wave alerts by the LIGO and Virgo collaborations during O2. We also describe the gravitational-wave observables that were sent in the alerts to enable searches for their counterparts. Finally, we give an overview of the online candidate alerts shared with observi...
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Research Interests: Physics, LIGO, Neutron Stars, Astrophysics, Stability, and 15 moreGravitational Waves, Planetary and Space Science, Efficiency, Black Hole, data analysis methods in fMRI, Sensitivity, Collapse, Capture, General Relativity and Quantum Cosmology, Coalescence, Astronomy and Astrophysics, Instrumentation and detectors, gravitational wave, Virgo, and neutron star
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We describe the observation of GW170104, a gravitational-wave signal produced by the coalescence of a pair of stellar-mass black holes. The signal was measured on January 4, 2017 at 10∶11:58.6 UTC by the twin advanced detectors of the... more
We describe the observation of GW170104, a gravitational-wave signal produced by the coalescence of a pair of stellar-mass black holes. The signal was measured on January 4, 2017 at 10∶11:58.6 UTC by the twin advanced detectors of the Laser Interferometer Gravitational-Wave Observatory during their second observing run, with a network signal-to-noise ratio of 13 and a false alarm rate less than 1 in 70 000 years. The inferred component black hole masses are 31.2_{-6.0}^{+8.4}M_{⊙} and 19.4_{-5.9}^{+5.3}M_{⊙} (at the 90% credible level). The black hole spins are best constrained through measurement of the effective inspiral spin parameter, a mass-weighted combination of the spin components perpendicular to the orbital plane, χ_{eff}=-0.12_{-0.30}^{+0.21}. This result implies that spin configurations with both component spins positively aligned with the orbital angular momentum are disfavored. The source luminosity distance is 880_{-390}^{+450} Mpc corresponding to a redshift of z=0....
Research Interests: Physics, Gravitation, LIGO, Relativity, General Relativity, and 15 moreBlack Holes, Astrophysics, Testing, Medicine, Gravitational Waves, Physical sciences, APS, Gravity Waves, Stars, Graviton, Signal to Noise Ratio, Astronomy and Astrophysics, orbital angular momentum, Interferometers, and gravitational wave
Research Interests: Computer Science, Computer Architecture, Distributed Computing, Grid Computing, Architecture, and 15 moreComputational Modeling, Computer Networks, Resource Allocation, Queueing theory, Dynamic Software Adaptation, Grid, Prototypes, Discrete Event Simulation, Exploit, Large Scale, Design and Implementation, Distributed Programming, Application Software, Dynamic Adaptation, and Queuing System
... Gabrielle Allen £ Werner Benger £Ý T om Goodale £ Hans-Christian Hege Ý ... The large and varied computational requirements of relativistic problems, such as black hole col-lisions, make them a good example for demonstrating the need... more
... Gabrielle Allen £ Werner Benger £Ý T om Goodale £ Hans-Christian Hege Ý ... The large and varied computational requirements of relativistic problems, such as black hole col-lisions, make them a good example for demonstrating the need for Grid computing, and an ideal ...
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Cactus is an open source problem solving environment designed for scientists and engineers. Its modular structure facilitates parallel computation across different architectures and collaborative code development between different groups.... more
Cactus is an open source problem solving environment designed for scientists and engineers. Its modular structure facilitates parallel computation across different architectures and collaborative code development between different groups. The Cactus Code originated in the academic research community, where it has been developed and used over many years by a large international collaboration of physicists and computational scientists. We discuss
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Research Interests: Gravitation, LIGO, Data Analysis, Data Management, Astrophysics, and 15 moreGravitational Waves, Cosmology, Astronomy, Interferometry, Computation, Kentsel Dönüşüm, Gravitational Wave Detectors, Fourier transform, American physical society, DDC, ENDES, Astronomy and Astrophysics, Amplitude, Mass Spectrometer, and gravitational wave
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Grid technology is widely emerging. Still, there is an eminent shortage of real Grid users, mostly due to the lack of a “critical mass” of widely deployed and reliable higher-level Grid services, tailored to application needs. The GridLab... more
Grid technology is widely emerging. Still, there is an eminent shortage of real Grid users, mostly due to the lack of a “critical mass” of widely deployed and reliable higher-level Grid services, tailored to application needs. The GridLab project aims to provide fundamentally new capabilities for applications to exploit the power of Grid computing, thus bridging the gap between application needs and existing Grid middleware. We present an overview of GridLab, a large-scale, EU-funded Grid project spanning over a dozen groups in Europe and the US. We first outline our vision of Grid-empowered applications and then discuss GridLab’s general architecture and its Grid Application Toolkit (GAT). We illustrate how applications can be Grid-enabled with the GAT and discuss GridLab’s scheduler as an example of GAT services.