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    • R D Williams

      R D Williams

      LIGO, California Institute of Technology, Pasadena, California 91125, USA. | LIGO, California Institute of Technology, Pasadena, CA 91125, United States of America | LIGO, ...



      KOL Resume for R D Williams


      LIGO, California Institute of Technology, Pasadena, California 91125, USA.


      LIGO, California Institute of Technology, Pasadena, CA 91125, United States of America


      LIGO, California Institute of Technology, Pasadena, CA 91125, USA

      INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy


      LIGO, California Institute of Technology, Pasadena, CA 91125, USA.


      Department of Graduate Studies, School of Nursing, University of Alabama, Birmingham 35294-1210, USA.


      School of Nursing, University of Alabama-Birmingham 35294-1210, USA.


      College of Nursing, University of Alabama, Huntsville 35899.

      University of California, San Francisco.

      USDA-ARS, National Agricultural Water Quality Laboratory, P.O. Box 1430, Durant, OK 74702


      University of Alabama, Huntsville College of Nursing, Alabama.


      Department of Urology, University of Iowa Hospitals and Clinics, Iowa City 52242.


      Rutherford Appleton Lab., Chilton, UK



      R D Williams: Influence Statistics

      Sample of concepts for which R D Williams is among the top experts in the world.
      Concept World rank
      activities serine palmitoyltransferase #1
      aids elective #1
      dsrna mismatched #1
      tangentially anchored #1
      18carbon longchain bases #1
      comfort levels pwas #1
      complication duodenal ulcer #1
      tumor inoculum #1
      mcgowan ghm #1
      anchored nematic #1
      3ketosphinganine synthase #1
      pwas nursing #1
      buf serine #2
      mammography korean #2
      tumor cell adherence #2
      percarbonates #2
      tissues serine #2
      microsomes rat tissues #2
      substance prostate #2
      droplet axis #2
      mammography korean women #2
      symptomatic scrotum #3
      bse mammography #3
      particulate adherence #3
      ketosphinganine synthase #3
      practice breast selfexamination #3
      fibrinolysin heparin #4
      scrotal contents #4
      lymphogranuloma inguinale #4
      urothelial surfaces #4
      bases tissues #5
      calcifications 3 #5
      mismatched dsrna #5
      ibd absorption #5
      palmitoyltransferase activities #5
      higher perceived barriers #6
      frequency bse #6
      pancreatitis salts #6
      radioactive cobalt #7
      growth factors alpha #7
      ghm model #7
      cysts epididymis #8


      Prominent publications by R D Williams

      KOL-Index: 9631

      On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions found in the interior of these stars. The initial, minimal-assumption analysis of the LIGO and Virgo data placed constraints on the tidal effects of the coalescing bodies, ...

      Known for Neutron Star | Equation State | 90 Credible Level | Ligo Virgo Data | Tidal Effects
      KOL-Index: 8294

      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 ...

      Known for Hole Coalescence | Component Spins | General Relativity | Observation Redshift | Graviton Mass
      KOL-Index: 8226

      Following a major upgrade, the two advanced detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) held their first observation run between September 2015 and January 2016. With a strain sensitivity of 10^{-23}/sqrt[Hz] at 100 Hz, the product of observable volume and measurement time exceeded that of all previous runs within the first 16 days of coincident observation. On September 14, 2015, the Advanced LIGO detectors observed a transient gravitational-wave signal ...

      Known for Advanced Ligo Detectors | Gw150914 Noise | Black Holes | Strain Sensitivity | Phys Rev
      KOL-Index: 8126

      On August 17, 2017 at 12∶41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×10^{4}  years. We infer the component masses of the binary to be between 0.86 and 2.26  M_{⊙}, in agreement with masses of known neutron stars. Restricting the component spins to the range ...

      Known for Neutron Star | Component Masses | Gravitational Waves | Gw170817 Observation | Luminosity Distance
      KOL-Index: 7919

      Parameter estimates of GW150914 were obtained using Bayesian inference, based on three semi-analytic waveform models for binary black hole coalescences. These waveform models differ from each other in their treatment of black hole spins, and all three models make some simplifying assumptions, notably to neglect sub-dominant waveform harmonic modes and orbital eccentricity. Furthermore, while the models are calibrated to agree with waveforms obtained by full numerical solutions of ...

      Known for Waveform Models | Systematic Errors | Numerical Simulations | Parameter Estimates | Bayesian Inference
      KOL-Index: 7678

      We report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with a network signal-to-noise ratio of 13 and a ...

      Known for Gravitational Waves | Mass Binary | Hole Coalescence | Luminosity Distance | Improved Constraints
      KOL-Index: 7653

      The LIGO detection of the gravitational wave transient GW150914, from the inspiral and merger of two black holes with masses ≳30M_{⊙}, suggests a population of binary black holes with relatively high mass. This observation implies that the stochastic gravitational-wave background from binary black holes, created from the incoherent superposition of all the merging binaries in the Universe, could be higher than previously expected. Using the properties of GW150914, we estimate the energy ...

      Known for Binary Black Holes | Wave Background | Stochastic Gravitational | Advanced Virgo | Energy Density
      KOL-Index: 7565

      The first observing run of Advanced LIGO spanned 4 months, from 12 September 2015 to 19 January 2016, during which gravitational waves were directly detected from two binary black hole systems, namely GW150914 and GW151226. Confident detection of gravitational waves requires an understanding of instrumental transients and artifacts that can reduce the sensitivity of a search. Studies of the quality of the detector data yield insights into the cause of instrumental artifacts and data ...

      Known for Advanced Ligo | Compact Binary Coalescences | Data Quality | Gravitational Waves | Gw150914 Gw151226
      KOL-Index: 7446

      The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-body motion of a compact-object binary in the large-velocity, highly nonlinear regime, and to witness the final merger of the binary and the excitation of uniquely relativistic modes of the gravitational field. We carry out several investigations to determine whether GW150914 is consistent with a binary black-hole merger in general relativity. We find that the final remnant's mass and spin, as ...

      Known for General Relativity | Mass Spin | Gravitational Field | Waveform Models | Unprecedented Opportunity
      KOL-Index: 7387

      We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20-1726 Hz frequency band. Finding no evidence of gravitational waves from either point ...

      Known for Gravitational Waves | Advanced Ligo | Directional Limits | Point Sources | Stochastic Background

      Key People For Advanced Ligo

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      R D Williams:Expert Impact

      Concepts for whichR D Williamshas direct influence:Advanced ligo,  Gravitational waves,  General relativity,  Serine palmitoyltransferase,  Compact binary coalescences,  Advanced ligo detectors,  Color doppler,  Scalar polarizations.

      R D Williams:KOL impact

      Concepts related to the work of other authors for whichfor which R D Williams has influence:Gravitational waves,  Black hole,  Neutron stars,  General relativity,  Dark matter,  Growth factor,  Quasinormal modes.



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      LIGO, California Institute of Technology, Pasadena, California 91125, USA. | LIGO, California Institute of Technology, Pasadena, CA 91125, United States of America | LIGO, California Institute of Technology, Pasadena, CA 91125, USA | INFN, Sezione di

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