Browsing University of Hertfordshire by Title

Now showing items 13185-13204 of 24139

    • A low-mass neutron flux monitor for the n_TOF facility at CERN 

      Mastinu, P. F.; Abbondanno, U.; Aerts, G.; Alvarez, H.; Andriamonje, S.; Angelopoulos, A.; Assimakopoulos, P.; Bacri, C. O.; Badurek, G.; Baumann, P.; Becvar, F.; Beer, H.; Benlliure, J.; Berthier, B.; Berthomieux, E.; Boffi, S.; Borcea, C.; Boscolo-Marchi, E.; Bustreo, N.; Calvino, P.; Cano-Ott, D.; Capote, R.; Carlson, P.; Cennini, P.; Chepel, V.; Chiaveri, E.; Coceva, C.; Colonna, N.; Cortes, G.; Cortina, D.; Couture, A.; Cox, J.; Dababneh, S.; Dahlfors, M.; David, S.; Dolfini, R.; Domingo-Pardo, C.; Duran, R.B.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Ferrari, A.; Ferreira-Lourenco, L.; Ferreira-Marques, R.; Frais-Koelbl, H.; Furman, W.I.; Giomataris, Y.; Goncalves, I. F.; Gonzalez-Romero, E.; Rauscher, T.; nTOF Collaboration (2004-09)
      A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a Li-6 deposit, placed ...

    • Low-mass Objects in Moving Groups 

      Galvez-Ortiz, M. C.; Clarke, J. R. A.; Pinfield, D.J.; Folkes, S. L.; Jenkins, J. S.; Perez, A. E. Garcia; Burningham, B.; Day-Jones, A. C.; Jones, H.R.A. (Astronomical Society of the Pacific, 2010)
      We present here the kinematic study of part of a 132 target sample of low-mass objects, previously selected by photometric and astrometric criteria as possible members to five young moving groups (MGs): Local Association ...

    • A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU 

      Damasso, M.; Del Sordo, Fabio; Anglada Escude, Guillem; Giacobbe, P.; Sozzetti, Alessandro; Morbidelli, L.; Pojmański, G.; Barbato, Domenico; Butler, R. P.; Jones, Hugh; Hambsch, Franz-Josef; Jenkins, James S.; Lopez-Gonzalez, Maria J.; Morales, Nicolas; Peña Rojas, Pablo A.; Rodriguez-Lopez, Cristina; Rodriguez, Eloy; Amado, Pedro J.; Anglada, Guillem; Feng, F.; Gómez, Jose F. (2020-01-15)
      Our nearest neighbor, Proxima Centauri, hosts a temperate terrestrial planet. We detected in radial velocities evidence of a possible second planet with minimum mass m c sin i c = 5.8 ± 1.9 M ⊕ and orbital period P c = ...

    • Low-Mass X-ray Binaries and Globular Clusters in Centaurus A 

      Jordan, A.; Sivakoff, G.R.; McLaughlin, D.E.; Blakeslee, J.P.; Evans, D.A.; Kraft, R.P.; Hardcastle, M.J.; Peng, E.W.; Cote, P.; Croston, J.H.; Juett, A.M.; Minniti, D.; Raychaudhury, S.; Sarazin, C.L.; Worrall, S.M.; Harris, W.E.; Woodley, K.A.; Birkinshaw, M.; Brassington, Nicola; Forman, W.R.; Jones, C.; Murray, S.S. (2007)
      We present results of Hubble Space Telescope and Chandra X-Ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of 440 GC candidates, we ...

    • Low-mass X-ray binaries and globular clusters streamers and ARCS in NGC 4278 

      D'Abrusco, R.; Fabbiano, G.; Brassington, Nicola (2014-03-01)
      We report significant inhomogeneities in the projected two-dimensional spatial distributions of low-mass X-ray binaries (LMXBs) and globular clusters (GCs) of the intermediate mass elliptical galaxy NGC 4278. In the inner ...

    • Low-metallicity inhibition of type Ia supernovae and galactic and cosmic chemical evolution 

      Kobayashi, Chiaki; Tsujimoto, T; Nomoto, K; Hachisu, I; Kato, M (1998-08-20)
      We introduce a metallicity dependence of the Type Ia supernova (SN Ia) rate into the Galactic and cosmic chemical evolution models. In our SN Ia progenitor scenario, the accreting white dwarf (WD) blows a strong wind to ...

    • Low-Power Neuromorphic Hardware for Signal Processing Applications : A review of architectural and system-level design approaches 

      Rajendran, Bipin; Sebastian, Abu; Schmuker, Michael; Srinivasa, Nayaran; Eleftheriou, Evangelos (2019-11-01)
      Machine learning has emerged as the dominant tool for implementing complex cognitive tasks that require supervised, unsupervised, and reinforcement learning. While the resulting machines have demonstrated in some cases ...

    • Low-power, high-linearity transconductor with a high tolerance for process and temperature variations 

      Zhao, Jing; Sun, Yichuang; Nie, Guigen; Simpson, Oluyomi; Xu, Weilin (2020-11-18)
      A novel scheme for tunable complementary metal–oxide–semiconductor (CMOS) transconductor robust against process and temperature (PT) variations is presented. The proposed configuration is a voltage controlled circuit based ...

    • Low-pressure gas chromatography ion trap mass spectrometry for the fast determination of polycyclic aromatic hydrocarbons in air samples 

      Ravindra, K.; Godoi, A.F.L.; Bencs, L.; Van Grieken, R. (2006)

    • Low-pressure gas chromatography: Recent trends and developments 

      Ravindra, K.; Dirtu, A.C.; Covaci, A. (2008)

    • A Low-Profile Beam-Steering Reflectarray with Integrated Leaky-Wave Feed and 2-Bit Phase Resolution for Ka-band SatCom 

      Zhang, Qiaoshan; Zhang, Mingtao; Shi, Xiaowei; Gao, Steven; Luo, Qi; Chen, Lei; Wan, Jixiang; Wang, Xudong (2021-09-15)
      A novel reflect array (RA) with ultra-low-profile and 2-bit phase quantization beam-steering ability is presented in this paper. To reduce the profile, a Leaky-wave feed is used to excite the RA with enhanced illumination ...

    • Low-Profile Wideband Circularly Polarized Array Antennas Using Integrated Half-Power Quadrature Power Divider 

      Wen, Lehu; Gao, Steven; Luo, Qi; Hu, Wei; Sanz-Izquierdo, Benito; Yang, Xue-Xia (2022-04-11)
      Low-profile wideband circularly polarized (CP) array antennas using integrated half-power quadrature power divider (HP-QPD) are presented. A novel HP-QPD is first proposed as an important design concept for CP radiation. ...

    • Low-resolution near-infrared spectroscopic signatures of unresolved ultracool companions to M dwarfs 

      Cook, Neil; Pinfield, D. J.; Marocco, F.; Burningham, B.; Jones, H. R. A.; Frith, J.; Zhong, J.; Luo, A. L.; Qi, Z. X.; Cowan, N. B.; Gromadzki, M.; Kurtev, R.G.; Guo, Y. X.; Wang, Y. F.; Song, Y. H.; Yi, Z. P.; Smart, R. L. (2017-06-01)
      We develop a method to identify the spectroscopic signature of unresolved L-dwarf ultracool companions, which compares the spectra of candidates and their associated control stars using spectral ratio differences and ...

    • Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211 

      Vreeswijk, P.M.; Smette, A.; Fruchter, S.; Palazzi, E.; Rol, E.; Wijers, R.A.M.J.; Kouveliotou, C.; Kaper, L.; Pian, E.; Masetti, N.; Frontera, F.; Hjorth, J.; Gorosabel, J.; Piro, L.; Fynbo, J.; Jakobsson, P.; Watson, D.; O'Brien, P.T.; Ledoux, C. (2006)

    • Low-Speed Aerodynamic Analysis Using Four Different Turbulent Models of Solver of a Wind Turbine Shroud 

      Ngouani Siewe, Micky; CHEN, Yong Kang; Day, Rodney; David-West, Opukuro (Springer Nature, 2021-04-30)
      This study presents the effect of four different turbulent models of solver on the aerodynamic analysis of a shroud at wind speed below 6 m/s. The converting shroud uses a combination of a cylindrical case and an inverted ...

    • Low-velocity impact behaviour of woven laminate plates with fire retardant resin 

      Grasso, Marzio; xu, yigeng; Ramji, Amit; Zhou, Gang; Chrysanthou, Andreas; Haritos, George; Chen, Yong Kang (2019-08-15)
      The understanding of the damage mechanisms for woven laminate plates under low-velocity impact is challenging as the damage mechanisms at the interface of adjacent layers are dominated by the fibre architecture. This work ...

    • Lower limb coordination and stiffness during landing from volleyball block jumps 

      Hughes, G.; Watkins, J. (2008)
      The aim of the study was to investigate lower limb coordination and stiffness in five male and five female university volleyball players performing block jump landings. Coordination was assessed using angle – angle plots ...

    • Lowered serum phenytoin concentrations during therapy with liquid food concentrates 

      Taylor, D.M.; Massey, C.A.; Willson, W.G.; Dhillon, S. (1993-03)

    • Lowering the age of criminal responsibility: How harm-focused public discourse overrode the official narrative in China 

      Chen, Qi (2021-07-09)
      Following a few high-profile cases, China lowered the age of criminal responsibility (ACR) from 14 to 12. From 1 March 2021, children aged 12 and 13 will be prosecuted if they commit the crime of murder or serious assault. ...

    • Loyalism and Radicalism in Lancashire, 1798-1815 

      Navickas, Katrina (Oxford University Press (OUP), 2009)
      Loyalism and Radicalism in Lancashire, 1798-1815 is a lively and detailed account of popular politics in Lancashire during the later years of the French Revolution and during the Napoleonic wars. Drawing on a wide variety ...