R. E. Firth

ORCID: 0000-0002-9427-1850
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About
Contact & Profiles
Research Areas
  • Gamma-ray bursts and supernovae
  • Astrophysics and Cosmic Phenomena
  • Pulsars and Gravitational Waves Research
  • Stellar, planetary, and galactic studies
  • Astronomy and Astrophysical Research
  • Data Management and Algorithms
  • Geographic Information Systems Studies
  • American Environmental and Regional History
  • Complex Network Analysis Techniques
  • Human Mobility and Location-Based Analysis
  • Astro and Planetary Science
  • Australian History and Society
  • Network Traffic and Congestion Control
  • Advanced Optical Network Technologies
  • Advanced Research in Systems and Signal Processing
  • Topic Modeling
  • Machine Learning in Materials Science
  • Global Political and Social Dynamics
  • Medical History and Innovations
  • Graph Theory and Algorithms
  • African history and culture studies
  • Natural Language Processing Techniques
  • Astrophysical Phenomena and Observations
  • Indigenous and Place-Based Education
  • African Education and Politics

University of Southampton
2014-2020

Science and Technology Facilities Council
2020

Daresbury Laboratory
2019

Inform (Germany)
2010

University of Montana
1996

We present an analysis of the early, rising light curves 18 Type Ia supernovae (SNe Ia) discovered by Palomar Transient Factory and La Silla-QUEST variability survey. fit these early data flux using a simple power law (f(t) = α × tn) to determine time first (t0), hence rise (trise) from peak luminosity, exponent power-law (n). find mean uncorrected 18.98 ± 0.54 d, with individual supernova (SN) times ranging 15.98 24.7 d. The n shows significant departures 'fireball model' 2 (or f(t) ∝ t2)...

10.1093/mnras/stu2314 article EN Monthly Notices of the Royal Astronomical Society 2014-12-09

The Large Synoptic Survey Telescope is designed to provide an unprecedented optical imaging dataset that will support investigations of our Solar System, Galaxy and Universe, across half the sky over ten years repeated observation. However, exactly how LSST observations be taken (the observing strategy or "cadence") not yet finalized. In this dynamically-evolving community white paper, we explore detailed performance anticipated science expected depend on small changes strategy. Using...

10.48550/arxiv.1708.04058 preprint EN other-oa arXiv (Cornell University) 2017-01-01

The design and analysis of time-domain sky surveys requires the ability to simulate accurately realistic populations core collapse supernova (SN) events. We present a set spectral time-series templates designed for this purpose, both hydrogen-rich (type II, IIn, IIb) stripped envelope (types Ib, Ic, Ic-BL) supernovae. use photometric spectroscopic data 67 supernovae from literature, each generate template. techniques used build are fully data-driven with no assumption any parametric form or...

10.1093/mnras/stz2448 article EN Monthly Notices of the Royal Astronomical Society 2019-09-18

We present a search for an electromagnetic counterpart of the gravitational wave source GW151226. Using Pan-STARRS1 telescope we mapped out 290 square degrees in optical i_ps filter starting 11.5hr after LIGO information release and lasting further 28 days. The first observations started 49.5hr time GW151226 detection. typically reached sensitivity limits = 20.3-20.8 covered 26.5% probability skymap. supplemented this with ATLAS survey data, reaching 31% region to shallower depths m~19....

10.3847/2041-8205/827/2/l40 article EN The Astrophysical Journal Letters 2016-08-19

We present photometry and time-series spectroscopy of the nearby type Ia supernova (SN Ia) SN 2015F over $-16$ days to $+80$ relative maximum light, obtained as part Public ESO Spectroscopic Survey Transient Objects (PESSTO). is a slightly sub-luminous with decline rate $\Delta m15(B)=1.35 \pm 0.03$ mag, placing it in region between normal 1991bg-like events. Our densely-sampled photometric data place tight constraints on epoch first light form early-time curve. The spectra exhibit...

10.1093/mnras/stw2678 article EN Monthly Notices of the Royal Astronomical Society 2016-10-17

Automated route guidance systems, both web-based systems and en-route have become commonplace in recent years. These often replace human-generated directions, which are incomplete, vague, or error. However, directions the ability to differentiate between easy complex steps through language a way that is more difficult automated systems. This article examines set of verbal better understand why some parts perceived as being than remaining steps. Insights from this analysis will lead...

10.5311/josis.2010.1.5 article EN cc-by Journal of Spatial Information Science 2010-07-27

We present a new, large-scale corpus for training and evaluating text summarization systems on legal opinions, called LegalOps. The includes <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">~</sub> 14K opinions together with their summaries from U.S. Federal Courts, e.g. the Supreme Court Appeals Courts. aim of this paper is to provide novel data source sufficient variety that it will advance theoretical work modeling particular patterns within...

10.1109/bigdata50022.2020.9378308 article EN 2021 IEEE International Conference on Big Data (Big Data) 2020-12-10

This work presents an annotation tool that automatically locates mentions of particular amino-acid residues in published papers and identifies the protein concerned. These matches can be provided context or a searchable format order for researchers to better use existing future literature.

10.1107/s2053230x1901210x article EN Acta Crystallographica Section F Structural Biology Communications 2019-11-01

10.1136/jramc-45-03-01 article DE Journal of the Royal Army Medical Corps 1925-09-01

This paper proposes a metric to measure the dissimilarity between graphs that may have different number of nodes. The proposed extends generalised optimal subpattern assignment (GOSPA) metric, which is for sets, graphs. graph GOSPA includes costs associated with node attribute errors properly assigned nodes, missed and false nodes edge mismatches computation this based on finding assignments in two graphs, possibility leaving some unassigned. We also propose lower bound computable polynomial...

10.48550/arxiv.2311.07596 preprint EN other-oa arXiv (Cornell University) 2023-01-01

Survey knowledge, as embodied in the road map, has been seen too slow a navigational aid to function effectively at speed of life smartphone/GPS-app era, capturing it does details highway network that are present heavy cognitive load user. Yet this very richness offers promise enabling user navigate with understanding, providing for flexible and resilient trip planning. But what if map’s was not because difficulty dealing its information, but information unnecessarily disordered? We suggest...

10.4230/lipics.cosit.2017.14 article EN Conference On Spatial Information Theory 2017-01-01
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