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Now showing items 13012-13031 of 24095

    • The LOFAR window on star-forming galaxies and AGN - curved radio SEDs and IR-radio correlation at 0 < z < 2.5 

      Rivera, G. Calistro; Williams, W. L.; Hardcastle, M. J.; Duncan, K. J.; Röttgering, H.~J.~A.; Best, Philip N.; Brüggen, Marcus; Chyzy, K.T.; Conselice, C. J.; De Gasperin, Francesco; Engels, D.; Gürkan, G.; Intema, Huib T.; Jarvis, M. J.; Mahony, E. K.; Miley, G.K.; Morabito, L. K.; Prandoni, I.; Sabater, J.; Smith, D. J. B.; Tasse, C.; van der Werf, P.; White, Glenn J. (2017-08-11)
      We present a study of the low-frequency radio properties of star forming (SF) galaxies and active galactic nuclei (AGN) up to redshift $z=2.5$. The new spectral window probed by the Low Frequency Array (LOFAR) allows us ...

    • LOFAR, VLA, and Chandra observations of the Toothbrush galaxy cluster 

      Van Weeren, R. J.; Brunetti, G.; Brüggen, M.; Andrade-Santos, F.; Ogrean, G. A.; Williams, W. L.; Röttgering, H. J. A.; Dawson, W. A.; Forman, W.R.; Gasperin, F. de; Hardcastle, M.J.; Jones, C.; Miley, G.K.; Rafferty, D. A.; Rudnick, L.; Sabater, J.; Sarazin, C.L.; Shimwell, T. W.; Bonafede, A.; Best, P. N.; Bîrzan, L.; Cassano, R.; Chyży, K. T.; Croston, J. H.; Dijkema, T. J.; Ensslin, T.; Ferrari, C.; Heald, G.; Hoeft, M.; Horellou, C.; Jarvis, M.J.; Kraft, R.P.; Mevius, M.; Intema, H. T.; Murray, S. S.; Orrú, E.; Pizzo, R.; Sridhar, S. S.; Simionescu, A.; Stroe, A.; Tol, S. van der; White, G.J. (2016-02-22)
      We present deep LOFAR observations between 120-181 MHz of the "Toothbrush" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known. Our LOFAR observations exploit a new and novel calibration ...

    • LOFAR-Boötes : Properties of high- and low-excitation radio galaxies at 0.5 < z < 2.0 

      Williams, W. L.; Rivera, G. Calistro; Best, Philip N.; Hardcastle, M. J.; Röttgering, H.~J.~A.; Duncan, K. J.; De Gasperin, Francesco; Jarvis, M. J.; Miley, G.K.; Mahony, E. K.; Morabito, L. K.; Nisbet, D. M.; Prandoni, I.; Smith, D. J. B.; Tasse, C.; White, Glenn J. (2018-04-11)
      This paper presents a study of the redshift evolution of radio-loud active galactic nuclei (AGN) as a function of the properties of their galaxy hosts in the Boötes field. To achieve this we match low-frequency radio sources ...

    • A LOFAR-IRAS cross-match study : the far-infrared radio correlation and the 150-MHz luminosity as a star-formation rate 

      Wang, L.; Gao, F.; Duncan, K. J.; Williams, W. L.; Rowan-Robinson, M.; Sabater, J.; Shimwell, T. W.; Bonato, M.; Calistro-Rivera, G.; Chyzy, K. T.; Farrah, D.; Gurkan Uygun, Gulay; Hardcastle, M. J.; McCheyne, I.; Prandoni, I.; Read, S. C.; Rottgering, H. J. A.; Smith, D. J. B. (2019-11-01)
      Aims. We aim to study the far-infrared radio correlation (FIRC) at 150 MHz in the local Universe (at a median redshift z~0:05) and improve the use of the rest-frame 150-MHz luminosity, L150, as a star-formation rate (SFR) ...

    • LOFAR/H-ATLAS: A deep low-frequency survey of the Herschel-ATLAS North Galactic Pole field 

      Hardcastle, M. J.; Gürkan, G.; Weeren, R. J. van; Williams, W. L.; Best, P. N.; Gasperin, F. de; Rafferty, D. A.; Read, S. C.; Sabater, J.; Shimwell, T. W.; Smith, D. J. B.; Tasse, C.; Bourne, N.; Brienza, M.; Brüggen, M.; Brunetti, G.; Chyży, K. T.; Conway, J.; Dunne, L.; Eales, S. A.; Maddox, S. J.; Jarvis, M. J.; Mahony, E. K.; Morganti, R.; Prandoni, I.; Röttgering, H. J. A.; Valiante, E.; White, G. J. (2016-10-21)
      We present LOFAR High-Band Array (HBA) observations of the Herschel-ATLAS North Galactic Pole survey area. The survey we have carried out, consisting of four pointings covering around 142 square degrees of sky in the ...

    • LOFAR/H-ATLAS: The low-frequency radio luminosity - star-formation rate relation 

      Gurkan, Gulay; Hardcastle, Martin J.; Smith, Daniel; Best, Philip N.; Bourne, Nathan; Calistro-Rivera, Gabriela; Heald, George; Jarvis, Matt J.; Prandoni, Isabella; Rottgering, Huub J. A.; Sabater, Jose; Shimwell, Tim; Tasse, Cyril; Williams, Wendy L. (2018-04-11)
      Radio emission is a key indicator of star-formation activity in galaxies, but the radio luminosity-star formation relation has to date been studied almost exclusively at frequencies of 1.4 GHz or above. At lower radio ...

    • Logarithmic simulated annealing for computer-assisted x-ray diagnosis 

      Albrecht, A.; Steinhofel, K.; Taupitz, M.; Wong, C.K. (2001)
      We present a new stochastic learning algorithm and first results of computational experiments on fragments of liver CT images. The algorithm is designed to compute a depth-three threshold circuit, where the first layer is ...

    • Logged labour: : a new paradigm of work organisation? 

      Huws, Ursula (2016-05-30)
      This essay argues that, during the period following the financial crisis of 2007-8, several different trends, already visible in earlier periods, have converged to create a new pattern of work organisation, a pattern which ...

    • Logic in Action: Wittgenstein's Logical Pragmatism and the Impotence of Scepticism 

      Moyal-Sharrock, Daniele (2003)

    • The logic of 'being informed' revisited and revised 

      Allo, P. (2011)
      The logic of 'being informed' gives a formal analysis of a cognitive state that does not coincide with either belief, or knowledge. To Floridi, who first proposed the formal analysis, the latter is supported by the fact ...

    • The logic of being informed 

      Floridi, L. (2006)
      One of the open problems in the philosophy of information is whether there is an information logic (IL), different from epistemic (EL) and doxastic logic (DL), which formalises the relation a is informed--that p (Iap) ...

    • Logica e Pensiero Visivo 

      Floridi, L. (1999)

    • Logical fallacies as informational shortcuts 

      Floridi, L. (2009)
      The paper argues that the two best known formal logical fallacies, namely denying the antecedent (DA) and affirming the consequent (AC) are not just basic and simple errors, which prove human irrationality, but rather ...

    • Logical inconsistency in construct relationships : Conflict or complexity? 

      Winter, David (1983)
      The study examines repertory grid measures of conflict. Evidence is provided that neurotic disorder is associated with high levels of logical consistency in construct relationships, particularly in those concerning ‘symptom ...

    • Logics and Limits in Ethical Outsourcing and Offshoring in the Global Financial Services Industry 

      Park, Kathleen; Hollinshead, Graham (2011)
      The offshore outsourcing of financial and other services has generated considerable heat in Western countries over the past decade. In this paper we subject the realities of offshoring to observation at company level by ...

    • London Charity Beneficiaries, c. 1800-1834: Questions of Agency 

      Webber, Megan (2016-11-21)
      In recent decades historians have ‘discovered’ agency in a wide range of geographical and temporal contexts, amongst many different types of actor. This dissertation employs the concept of agency to dissect the dynamics ...

    • The London Vagrancy crisis of the 1780s 

      Hitchcock, Tim (2013-04)
      This article outlines the changing character of vagrant removal from the City of London during the 1780s, suggesting that the City largely abandoned its duty to 'punish' the vagrant poor in favour of a policy of simply ...

    • London's Lives, 1690-1800 

      Hitchcock, Tim; Shoemaker, Robert (HRI Digital, 2010)
      A fully searchable edition of 240,000 manuscripts from eight archives and fifteen datasets, giving access to 3.35 million names.

    • London’s food policy: leveraging the policy sub-system, programme and plan 

      Parsons, Kelly; Lang, Tim; Barling, David (2021-08-31)
      This article explores the spaces for, and boundaries to, London’s food policy. Leveraging the concept of institutions as policy-structuring forces, it positions immediate policymaking capacity and potential as delineated ...

    • “Long ball” and “balls deep”: a critical reading of female coach-learners’ experiences of the UEFA A licence 

      Sawiuk, Rebecca; Lewis , Colin; Taylor , William (2021-01-15)
      In this article we present a critical reading of female coachlearners’ experiences of the Union of European Football Association’s Advanced Licence (UEFA A), which at the time of writing have been largely ignored. It comes ...