Browsing University of Hertfordshire by Title

Now showing items 16346-16365 of 24305

    • Paraglacial rock-slope failure following deglaciation in western Norway 

      Curry, Alastair (Springer Nature, 2020-10-05)
      The paraglacial framework describes the geomorphological response to glaciation and deglaciation, whereby non-renewable, metastable, glacially-conditioned sediment sources are progressively released by a range of nonglacial ...

    • Parallaxes and Infrared Photometry of three Y0 dwarfs 

      Smart, R. L.; Apai, Dániel; Kirkpatrick, J. Davy; Leggett, S.K.; Marocco, F.; Morrison, Jane E.; Jones, H. R. A.; Pinfield, D.; Tremblin, P.; Amundsen, D. S. (2017-03-24)
      We have followed up the three Y0 dwarfs WISEPA J041022.71+150248.5, WISEPA J173835.53+273258.9 and WISEPC J205628.90+145953.3 using the UKIRT/WFCAM telescope/instruments. We find parallaxes that are more consistent and ...

    • Parallaxes and physical properties of 11 mid-to-late T dwarfs 

      Marocco, F.; Smart, R.L.; Jones, H.R.A.; Burningham, B.; Lattanzi, M.G.; Leggett, S.K.; Lucas, P.W.; Tinney, C.G.; Adamson, A.; Evans, D. W.; Lodieu, N.; Murray, D.N.; Pinfield, D.J.; Tamura, M. (2010)
      Aims. We present parallaxes of 11 mid-to-late T dwarfs observed in the UKIRT Infrared Deep Sky Survey. We use these results to test the reliability of model predictions in magnitude–color space, determine a magnitude-spectral ...

    • Parallaxes of Five L Dwarfs with a Robotic Telescope 

      Wang, Y.; Jones, H.R.A.; Smart, R.L.; Marocco, F.; Pinfield, D.J.; Shao, Z.; Steele, I.A.; Zhang, Z.; Andrei, A.H.; Burgasser, A. J.; Cruz, K. L.; Yu, J.; Clarke, J. R. A.; Leigh, C.J.; Sozzetti, A.; Murray, D. N.; Burningham, B. (2014-01-01)
      We report the parallax and proper motion of five L dwarfs obtained with observations from the robotic Liverpool Telescope. Our derived proper motions are consistent with published values and have considerably smaller errors. ...

    • Parallaxes of L and T dwarfs 

      Smart, R.L.; Bailer-Jones, C.A.L.; Jones, H.R.A. (2004)

    • Parallaxes of southern extremely cool objects (PARSEC). II : Spectroscopic follow-up and parallaxes of 52 targets 

      Marocco, F.; Andrei, A.H.; Smart, R.L.; Jones, H.R.A.; Pinfield, D.J.; Day-Jones, A. C.; Clarke, J. R. A.; Sozzetti, A.; Lucas, P.W.; Bucciarelli, B.; Penna, J.L. (2013-12)
      We present near-infrared spectroscopy for 52 ultracool dwarfs, including two newly discovered late-M dwarfs, one new late-M subdwarf candidate, three new L, and four new T dwarfs. We also present parallaxes and proper ...

    • Parallaxes of southern extremely cool objects III : 118 L and T dwarfs 

      Smart, R. L.; Bucciarelli, B.; Jones, H. R. A.; Marocco, F.; Andrei, A. H.; Goldman, B.; Mendez, R. A.; d'Avila, V. A.; Burningham, B.; Camargo, J. I. B.; Crosta, M. T.; Daprà, M.; Jenkins, J. S.; Lachaume, R.; Lattanzi, M. G.; Penna, J. L.; Pinfield, D. J.; Neto, D. N. da Silva; Sozzetti, A.; Vecchiato, A. (2018-12-11)
      We present new results from the Parallaxes of Southern Extremely Cool dwarfs program to measure parallaxes, proper motions and multiepoch photometry of L and early T dwarfs. The observations were made on 108 nights over ...

    • Parallaxes of southern extremely cool objects. I. : Targets, proper motions, and first results 

      Andrei, A.H.; Smart, R.L.; Penna, J.L.; d'Avila, V.A.; Bucciarelli, B.; Camargo, J.I.B.; Crosta, M.T.; Dapra, M.; Goldman, B.; Jones, H.R.A.; Lattanzi, M.G.; Nicastro, L.; Pinfield, D.J.; da Silva Neto, D. N.; Teixeira, R. (2011)
      We present results from the PARallaxes of Southern Extremely Cool objects ( PARSEC) program, an observational program begun in 2007 April to determine parallaxes for 122 L and 28 T southern hemisphere dwarfs using the Wide ...

    • Parallel dynamic subcarrier and time allocation protocol for long-reach OFDMA-PONs 

      Lim, Wansu; Kourtessis, Pandelis; Milosavljevic, Milos; Senior, J.M.; Choi, H. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      A new advanced medium access control protocol is described to support 100 km reach access networks, exhibiting the required quality-of-service for next generation passive optical networks based on orthogonal frequency ...

    • Parallel Image Encryption Algorithm Using Partitioned Cellular Automata on Graphic Processor Unit 

      Fazlali, Mahmood; Alihoseini, Amirhossein; Zarei, Ebrahim; Tabani, Myasar; Pourmoafi, Seyedali (Institute of Electrical and Electronics Engineers (IEEE), 2023-07-27)
      Image encryption is a reliable method for securely transmitting images over a network. The time required to encrypt and decrypt an image in online applications is also very important. Although cellular automata cryptography ...

    • Parallel Microbial Ecology of Pasteuria and Nematode Species in Scottish soils 

      Orr, Jamie; Neilson, Roy; Freitag, Thomas; Roberts, David; Davies, Keith; Blok, Vivian; Cock, Peter (2020-01-28)
      Pasteuria spp. are endospore forming bacteria which act as natural antagonists to many of the most economically significant plant parasitic nematodes (PPNs). Highly species-specific nematode suppression may be observed in ...

    • A Parallel Pipelined Processor with Conditional Instruction Execution 

      Adams, R.G.; Steven, G.B. (1991)
      In a recent paper by Smith, Lam and Horowitz [1] the concept of 'boosting' was introduced, where instructions from one of the possible instruction streams following a conditional branch were scheduled by the compiler for ...

    • Parallel signal processing with S-Net 

      Penczek, F.; Herhut, S.; Grelck, C.; Scholz, S.; Shafarenko, A.; Barrere, R.; Lenormand, E. (2010)
      We argue that programming high-end stream-processing applications requires a form of coordination language that enables the designer to represent interactions between stream-processing functions asynchronously. We further ...

    • Parallel Solution of Diffusion Equations using Laplace Transform Methods with Particular Reference to Black-Scholes Models of Financial Options 

      Fitzharris, Andrew (University of Hertfordshire, 2014-07-22)
      Diffusion equations arise in areas such as fluid mechanics, cellular biology, weather forecasting, electronics, mechanical engineering, atomic physics, environmental science, medicine, etc. This dissertation considers ...

    • The Paralympic Games fails to increase disabled people’s participation in sport 

      Brown, Dr Christopher (2020-01-28)

    • Paramedic experiences of providing care in Wales (UK) during the 2020 COVID-19 pandemic (PECC-19): a qualitative study using evolved grounded theory 

      Rees, Nigel; Smythe, Lauren; Hogan, Chloe; Williams, Julia (2021-06)
      Objective: To explore paramedic experiences of providing care during the 2020 COVID-19 pandemic and develop theory in order to inform future policy and practice. Design: Qualitative study using constructivist evolved ...

    • Paramedics and nurses in partnership: perceptions of a new response to low-priority ambulance calls 

      Machen, I.; Dickinson, Angela; Williams, J.; Widiatmoko, D.; Kendall, S. (2007)

    • Parameter analysis of atomized droplets sprayed evaporation in flue gas flow 

      Feng, Shuqing; Feng, Shuqin; Ge, Zhihua; Yang, Lijun; Du, Xiaoze; Wu, Hongwei (2019-02-01)
      Spraying flue gas desulfurization (FGD) wastewater into the flue duct is a promising technology to achieve zero emission of wastewater by evaporation in thermal power plants. To deal with the scale and corrosion on flue ...

    • Parameters for very light jets of cD galaxies 

      Krause, M.; Camenzind, M. (2003-10-01)
      Recent Chandra X-ray observations of jets in central cluster galaxies show interesting features around the symmetry plane. We have carried out simulations involving bipolar jets, removing the artificial boundary condition ...

    • Parametric analysis of influencing factors in Phase Change Material Wallboard (PCMW) 

      Zhou, D.; Shire, G.S.F.; Tian, Yuan (2014-04-15)
      Incorporating Phase Change Materials (PCMs) into traditional building structures has been considered as an effective way to reduce the mismatch between energy supply and demand and in turn to minimise energy consumption ...