Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars

Liu, K.; Bassa, C. G.; Janssen, G. H.; Karuppusamy, R.; McKee, J.; Kramer, M.; Lee, K. J.; Perrodin, D.; Purver, M.; Sanidas, S.; Smits, R.; Stappers, B. W.; Weltevrede, P.; Zhu, W. W.

doi:10.1093/mnras/stw2223

Resolution-aware Ensemble of Pose and Illumination-Invariant Feature Descriptors for Face Identification in Unconstrained Videos (2019)
Journal Article
Fagbola, T. M., & Thakur, C. S. (2019). Resolution-aware Ensemble of Pose and Illumination-Invariant Feature Descriptors for Face Identification in Unconstrained Videos. International Journal of Engineering Research & Technology, 12(12), 3114-3126

The recurring global security insurgence has posed new opportunities for massive deployment of Video Surveillance Systems (VSS). However, videos captured by such systems suffer characterized Low Resolution (LR), varying illumination and pose challeng... Read More about Resolution-aware Ensemble of Pose and Illumination-Invariant Feature Descriptors for Face Identification in Unconstrained Videos.

TERMHIGEN – A hybrid metaheuristic technique for solving large-scale vehicle routing problem with time windows (2019)
Journal Article
Fagbola, T. M., & Thakur, S. C. (2019). TERMHIGEN – A hybrid metaheuristic technique for solving large-scale vehicle routing problem with time windows. International Journal of Engineering Research & Technology, 12(2), 180-195

Vehicle Routing Problem with Time Windows (VRPTW) involves traversing a coordinated set of vehicular paths such that a set of customers is visited once within a given time-stamped boundary. VRPTW poses a great challenge to logistics distribution and... Read More about TERMHIGEN – A hybrid metaheuristic technique for solving large-scale vehicle routing problem with time windows.

Investigating the effect of implementation languages and large problem sizes on the tractability and efficiency of sorting algorithms (2019)
Journal Article
Fagbola, T. M., & Thakur, S. C. (2019). Investigating the effect of implementation languages and large problem sizes on the tractability and efficiency of sorting algorithms. International Journal of Engineering Research & Technology, 12(2), 196-203

Sorting is a data structure operation involving a re-arrangement of an unordered set of elements with witnessed real life applications for load balancing and energy conservation in distributed, grid and cloud computing environments. However, the rear... Read More about Investigating the effect of implementation languages and large problem sizes on the tractability and efficiency of sorting algorithms.

Rab-KAMS: A reproducible knowledge management system with visualization for preserving Rabbit Farming and Production Knowledge (2019)
Journal Article
Fagbola, T. M., Thakur, S. C., & Olugbara, O. (2019). Rab-KAMS: A reproducible knowledge management system with visualization for preserving Rabbit Farming and Production Knowledge. International journal of advanced computer science and applications : IJACSA, 10(1), 263-273. https://doi.org/10.14569/IJACSA.2019.0100135

The sudden rise in rural-to-urban migration has been a key challenge threatening food security and most especially the survival of Rabbit Farming and Production (RFP) in Sub-Saharan Africa. Currently, significant knowledge of RFP is going into extinc... Read More about Rab-KAMS: A reproducible knowledge management system with visualization for preserving Rabbit Farming and Production Knowledge.

A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars (2018)
Journal Article
McKee, J. W., Stappers, B. W., Bassa, C. G., Chen, S., Cognard, I., Gaikwad, M., …Zhu, W. W. (2019). A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 483(4), 4784-4802. https://doi.org/10.1093/mnras/sty3058

We have studied 4265 giant pulses (GPs) from the millisecond pulsar B1937+21; the largest-ever sample gathered for this pulsar, in observations made with the Large European Array for Pulsars. The pulse energy distribution of GPs associated with the i... Read More about A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars.

Tests of gravitational symmetries with pulsar binary J1713+0747 (2018)
Journal Article
Zhu, W. W., Desvignes, G., Wex, N., Caballero, R. N., Champion, D. J., Demorest, P. B., …Tiburzi, C. (2019). Tests of gravitational symmetries with pulsar binary J1713+0747. Monthly notices of the Royal Astronomical Society, 482(3), 3249-3260. https://doi.org/10.1093/mnras/sty2905

Symmetries play a fundamental role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries which are all implemented by general relativity. Alternative theories, however, are generall... Read More about Tests of gravitational symmetries with pulsar binary J1713+0747.

Studying the Solar system with the International Pulsar Timing Array (2018)
Journal Article
Caballero, R. N., Guo, Y. J., Lee, K. J., Lazarus, P., Champion, D. J., Desvignes, G., …Zhu, W. W. (2018). Studying the Solar system with the International Pulsar Timing Array. Monthly notices of the Royal Astronomical Society, 481(4), 5501-5516. https://doi.org/10.1093/MNRAS/STY2632

Pulsar-timing analyses are sensitive to errors in the Solar-system ephemerides (SSEs) that timing models utilize to estimate the location of the Solar-system barycentre, the quasi-inertial reference frame to which all recorded pulse times-of-arrival... Read More about Studying the Solar system with the International Pulsar Timing Array.

The kinematics of cluster galaxies via velocity dispersion profiles (2018)
Journal Article
Bilton, L. E., & Pimbblet, K. A. (2018). The kinematics of cluster galaxies via velocity dispersion profiles. Monthly notices of the Royal Astronomical Society, 481(2), 1507-1521. https://doi.org/10.1093/mnras/sty2379

© 2018 The Author(s). We present an analysis of the kinematics of a sample of 14 galaxy clusters via velocity dispersion profiles (VDPs), compiled using cluster parameters defined within the X-Ray Galaxy Clusters Database (BAX) cross-matched with dat... Read More about The kinematics of cluster galaxies via velocity dispersion profiles.

The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations (2018)
Journal Article
Oppenheimer, B. D., Schaye, J., Crain, R. A., Werk, J. K., & Richings, A. J. (2018). The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations. Monthly notices of the Royal Astronomical Society, 481(1), 835-859. https://doi.org/10.1093/mnras/sty2281

We explore the circumgalactic metal content traced by commonly observed low ion absorbers, including C II, SiII, SiIII, SiIV, and MgII. We use a set of cosmological hydrodynamical zoom simulations run with the EAGLE model and including a non-equilibr... Read More about The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations.

Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries (2018)
Journal Article
Perera, B. B., Stappers, B. W., Babak, S., Keith, M. J., Antoniadis, J., Bassa, C. G., …Taylor, S. R. (2018). Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries. Monthly notices of the Royal Astronomical Society, 478(1), 218-227. https://doi.org/10.1093/mnras/sty1116

We search for continuous gravitational waves (CGWs) produced by individual supermassive black hole binaries in circular orbits using high-cadence timing observations of PSR J1713+0747. We observe this millisecond pulsar using the telescopes in the Eu... Read More about Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries.

Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision (2018)
Journal Article
McKee, J. W., Lyne, A. G., Stappers, B. W., Bassa, C. G., & Jordan, C. A. (2018). Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision. Monthly notices of the Royal Astronomical Society, 479(3), 4216-4224. https://doi.org/10.1093/mnras/sty1727

We have measured variations in scattering time-scales in the Crab Pulsar over a 30-yr period, using observations made at 610 MHz with the 42-ft telescope at Jodrell Bank Observatory. Over more recent years, where regular Lovell Telescope observations... Read More about Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision.

Radiative cooling of swept-up gas in AGN-driven galactic winds and its implications for molecular outflows (2018)
Journal Article
Richings, A. J., & Faucher-Giguère, C. A. (2018). Radiative cooling of swept-up gas in AGN-driven galactic winds and its implications for molecular outflows. Monthly notices of the Royal Astronomical Society, 478(3), 3100-3119. https://doi.org/10.1093/MNRAS/STY1285

We recently used hydrochemical simulations to demonstrate that molecular outflows observed in luminous quasars can be explained by molecule formation within the active galactic nucleus (AGN) wind. However, these simulations cover a limited parameter... Read More about Radiative cooling of swept-up gas in AGN-driven galactic winds and its implications for molecular outflows.

Development of mobile-interfaced machine learning-based predictive models for improving students' performance in programming courses (2018)
Journal Article
Matthew, F. T., Adepoju, A. I., Ayodele, O., Olumide, O., Olatayo, O., Adebimpe, E., …Funmilola, E. (2018). Development of mobile-interfaced machine learning-based predictive models for improving students' performance in programming courses. International journal of advanced computer science and applications : IJACSA, 9(5), 105-115. https://doi.org/10.14569/IJACSA.2018.090514

Student performance modelling (SPM) is a critical step to assessing and improving students' performances in their learning discourse. However, most existing SPM are based on statistical approaches, which on one hand are based on probability, depictin... Read More about Development of mobile-interfaced machine learning-based predictive models for improving students' performance in programming courses.

The origin of fast molecular outflows in quasars: Molecule formation in AGN-driven galactic winds (2017)
Journal Article
Richings, A. J., & Faucher-Giguère, C. A. (2018). The origin of fast molecular outflows in quasars: Molecule formation in AGN-driven galactic winds. Monthly notices of the Royal Astronomical Society, 474(3), 3673-3699. https://doi.org/10.1093/mnras/stx3014

We explore the origin of fast molecular outflows that have been observed in active galactic nuclei (AGNs). Previous numerical studies have shown that it is difficult to create such an outflow by accelerating existing molecular clouds in the host gala... Read More about The origin of fast molecular outflows in quasars: Molecule formation in AGN-driven galactic winds.

Flickering AGN can explain the strong circumgalactic OVI observed by COS-Halos (2017)
Journal Article
Oppenheimer, B. D., Segers, M., Schaye, J., Richings, A. J., & Crain, R. A. (2018). Flickering AGN can explain the strong circumgalactic OVI observed by COS-Halos. Monthly notices of the Royal Astronomical Society, 474(4), 4740-4755. https://doi.org/10.1093/mnras/stx2967

Proximity zone fossils (PZFs) are ionization signatures around recently active galactic nuclei (AGNs) where metal species in the circumgalactic medium remain overionized after the AGNs have shut offdue to their long recombination time scales. We expl... Read More about Flickering AGN can explain the strong circumgalactic OVI observed by COS-Halos.

Metals in the circumgalactic medium are out of ionization equilibrium due to fluctuating active galactic nuclei (2017)
Journal Article
Segers, M. C., Oppenheimer, B. D., Schaye, J., & Richings, A. J. (2017). Metals in the circumgalactic medium are out of ionization equilibrium due to fluctuating active galactic nuclei. Monthly notices of the Royal Astronomical Society, 471(1), 1026-1044. https://doi.org/10.1093/MNRAS/STX1633

We study the effect of a fluctuating active galactic nucleus (AGN) on the abundance of circumgalactic OVI in galaxies selected from the Evolution and Assembly of GaLaxies and their Environments simulations. We follow the time-variable OVI abundance i... Read More about Metals in the circumgalactic medium are out of ionization equilibrium due to fluctuating active galactic nuclei.

The beamformer and correlator for the Large European Array for Pulsars (2017)
Journal Article
Smits, R., Bassa, C. G., Janssen, G. H., Karuppusamy, R., Kramer, M., Lee, K. J., …Zhu, W. W. (2017). The beamformer and correlator for the Large European Array for Pulsars. Astronomy and Computing, 19, 66-74. https://doi.org/10.1016/j.ascom.2017.02.002

The Large European Array for Pulsars combines Europe's largest radio telescopes to form a tied-array telescope that provides high signal-to-noise observations of millisecond pulsars (MSPs) with the objective to increase the sensitivity of detecting l... Read More about The beamformer and correlator for the Large European Array for Pulsars.

A Mathematical Model of Lymphangiogenesis in a Zebrafish Embryo (2017)
Journal Article
Wertheim, K. Y., & Roose, T. (2017). A Mathematical Model of Lymphangiogenesis in a Zebrafish Embryo. Bulletin of Mathematical Biology, 79(4), 693-737. https://doi.org/10.1007/s11538-017-0248-7

The lymphatic system of a vertebrate is important in health and diseases. We propose a novel mathematical model to elucidate the lymphangiogenic processes in zebrafish embryos. Specifically, we are interested in the period when lymphatic endothelial... Read More about A Mathematical Model of Lymphangiogenesis in a Zebrafish Embryo.

Timing of 29 Pulsars Discovered in the PALFA Survey (2017)
Journal Article
Lyne, A. G., Stappers, B. W., Bogdanov, S., Ferdman, R. D., Freire, P. C., Kaspi, V. M., …Machenschalk, B. (2017). Timing of 29 Pulsars Discovered in the PALFA Survey. The Astrophysical journal, 834(2), Article 137. https://doi.org/10.3847/1538-4357/834/2/137

We report on the discovery and timing observations of 29 distant long-period pulsars found in the ongoing Arecibo L-band Feed Array pulsar survey. Following discovery with the Arecibo Telescope, confirmation and timing observations of these pulsars o... Read More about Timing of 29 Pulsars Discovered in the PALFA Survey.

Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars (2016)
Journal Article
Liu, K., Bassa, C. G., Janssen, G. H., Karuppusamy, R., McKee, J., Kramer, M., …Zhu, W. W. (2016). Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 463(3), 3239-3248. https://doi.org/10.1093/mnras/stw2223

Single pulses preserve information about the pulsar radio emission and propagation in the pulsar magnetosphere, and understanding the behaviour of their variability is essential for estimating the fundamental limit on the achievable pulsar timing pre... Read More about Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars.

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