Browsing University of Hertfordshire by Title

Now showing items 23472-23491 of 24235

    • Voltage Profile and Power Quality Improvement Using Multicell Dynamic Voltage Restorer 

      Benamar, Tahar Karim; Allali, Ahmed; Merabet Boulouiha, Houari; Denai, Mouloud (2022-12-01)
      Multi-level converter topologies are increasingly being used in various applications due to their high power, high voltage, and low harmonic levels in the output waveforms. These converter topologies produce different ...

    • Voltage-dependent sodium and potassium, but no calcium conductances in DDT1 MF-2 smooth muscle cells 

      Molleman, A.; Nelemans, A.; Vandenakker, J.; Duin, M.; Denhertog, A. (1991)

    • Voltage-gated and agonist mediated rises in intracellular Ca in rat clonal pituitary cells (GH3) held under voltage clamp 

      Benham, C.D. (1989)

    • Volterra-Based Reconfigurable Nonlinear Equalizer for Coherent OFDM 

      Giacoumidis, Elias; Aldaya, Ivan; Jarajreh, Mutsam A; Tsokanos, Athanasios; Thai Le, Son; Farjady, Farsheed; Jaouën, Yves; Ellis, Andrew D; Doran, Nick J (2014-07-15)
      A reconfigurable nonlinear equalizer (RNLE) based on inverse Volterra series transfer function is proposed for dual-polarization (DP) and multiband coherent optical orthogonal frequency-division multiplexing (OFDM) signals. ...

    • Volumes, Voids and Terrain 

      Carta, Silvio (2016)

    • Voluntary hospices in England : a viable business model? 

      Theodosopoulos, G. (2011)
      This article is concerned with how the UK Government's End of Life Care Strategy seeks to draw upon the capacity and additional choice provided by voluntary charitable hospices in England. Constructing a hospice financial ...

    • Voluntary involuntariness : Thought suppression and the regulation of the experience of will 

      Wegner, D.M.; Erskine, J.A.K. (2003)
      Participants were asked to carry out a series of simple tasks while following mental control instructions. In advance of each task, they either suppressed thoughts of their intention to perform the task, concentrated on ...

    • Volunteer trials of a novel improvised dry decontamination protocol for use during mass casualty incidents as part of the UK’S Initial Operational Response (IOR) 

      Amlôt, Richard; Carter, Holly; Riddle, Lorna; Larner, Joanne; Chilcott, Robert P. (2017-06-16)
      Previous studies have demonstrated that rapid evacuation, disrobing and emergency decontamination can enhance the ability of emergency services and acute hospitals to effectively manage chemically-contaminated casualties. ...

    • Vplyvy PZI na trhy výrobných faktorov 

      Fifekova, Martina (2007)

    • Vpu transmembrane peptide structure obtained by site-specific Fourier transform infrared dichroism and global molecular dynamics searching 

      Kukol, A.; Arkin, I.T. (1999-09)
      The recently developed method of site-directed Fourier transform infrared dichroism for obtaining orientational constraints of oriented polymers is applied here to the transmembrane domain of the vpu protein from the human ...

    • The VST photometric hα survey of the Southern Galactic Plane and Bulge (VPHAS+) 

      Drew, J.E.; González-Solares, Eduardo A.; Greimel, Robert; Irwin, M.J.; Küpcü Yoldaş, A.; Lewis, J.R.; Barentsen, Geert; Eislöffel, Jochen; Farnhill, Hywel J.; Martin, Bill; Walton, Nicholas A.; Mohr-Smith, M.; Raddi, Roberto; Sale, Stuart E.; Wright, Nicholas J.; Groot, Paul J.; Barlow, Michael J.; Corradi, R.L.M.; Drake, Jeremy J.; Fabregat, Juan; Frew, David J.; Gänsicke, Boris T.; Knigge, Christian; Mampaso, Antonio; Morris, R.A.H.; Naylor, Tim J.; Parker, Quentin A.; Phillipps, Steven; Ruhland, Christine; Steeghs, Danny T H; Unruh, Y.C.; Vink, Jorick S.; Wesson, Roger; Zijlstra, Albert (2014-05-21)
      The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ~1 arcsec angular resolution. Its footprint spans the Galactic latitude range -5o ...

    • Vulnerability to food insecurity among older people: the role of social capital 

      Wills, Wendy; Dickinson, Angela (2023-05-08)
      Food insecurity is a public health issue in Western countries, including the UK. Being food insecure means older adults may not access sufficient nutritious, safe and socially acceptable food, leading to a higher risk of ...

    • VVV DR1: The first data release of the Milky Way bulge and southern plane from the near-infrared ESO public survey VISTA variables in the Vía Láctea 

      Saito, R.K.; Hempel, M.; Minniti, D.; Lucas, P.W.; Rejkuba, M.; Toledo, I.; Gonzalez, O. A.; Alonso-García, J.; Irwin, M.J.; Gonzalez-Solares, E.; Hodgkin, S.T.; Lewis, J.R.; Cross, N.; Ivanov, V.D.; Kerins, E.; Emerson, J.P.; Soto, M.; Amôres, E.B.; Gurovich, S.; Dékány, I.; Angeloni, R.; Beamin, J.C.; Catelan, M.; Padilla, N.; Zoccali, M.; Pietrukowicz, P.; Moni Bidin, C.; Mauro, F.; Geisler, D.; Folkes, S.L.; Sale, S.E.; Borissova, J.; Kurtev, R.; Ahumada, A.V.; Alonso, M.V.; Adamson, A.; Arias, J.I.; Bandyopadhyay, R.M.; Barbá, R.H.; Barbuy, B.; Baume, G. L.; Bedin, L.R.; Bellini, A.; Benjamin, R.; Bica, E.; Bonatto, C.; Bronfman, L.; Carraro, G.; Chenè, A.N.; Clariá, J.J.; Clarke, J.R.A.; Contreras, C.; Corvillón, A.; de Grijs, R.; Dias, B.; Drew, J.E.; Fariña, C.; Feinstein, C.; Fernández-Lajús, E.; Gamen, R.C.; Gieren, W.; Goldman, B.; González-Fernández, C.; Grand, R. J. J.; Gunthardt, G.; Hambly, N.C.; Hanson, M. M.; Helminiak, K.G.; Hoare, M.G.; Huckvale, L.; Jordán, A.; Kinemuchi, K.; Longmore, A.; López-Corredoira, M.; Maccarone, T.; Majaess, D.; Martín, E.L.; Masetti, N.; Mennickent, R.E.; Mirabel, I.F.; Monaco, L.; Morelli, L.; Motta, V.; Palma, T.; Parisi, M.C.; Parker, Q.; Peñaloza, F.; Pietrzyski, G.; Pignata, G.; Popescu, B.; Read, M. A.; Rojas, A.; Roman-Lopes, A.; Ruiz, M.T.; Saviane, I.; Schreiber, M. R.; Schröder, A. C.; Sharma, S.; Smith, M.D.; Sodré, L.; Stead, J.; Stephens, A. W.; Tamura, M.; Tappert, C.; Thompson, Mark; Valenti, E.; Vanzi, L.; Walton, N.A.; Weidmann, W.; Zijlstra, A. (2012)
      Context. The ESO public survey VISTA variables in the Vía Láctea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for about five years. Aims. We ...

    • VVV High proper motion stars I. The catalogue of bright Ks stars 

      Kurtev, R.; Gromadzki, M.; Beamin, J. C.; Folkes, S. L.; Ramirez, K. Pena; Ivanov, V. D.; Borissova, J.; Villanueva, V.; Minniti, D.; Mendez, R.; Lucas, P. W.; Smith, L. C.; Pinfield, D. J.; Kuhn, M. A.; Jones, H. R. A.; Antonova, A.; Yip, A. K. P. (2017-01-01)
      Knowledge of the stellar content near the Sun is important for a broad range of topics ranging from the search for planets to the study of Milky Way structure. The most powerful method for identifying potentially nearby ...

    • VVV High Proper Motion Survey 

      Gromadzki, M.; Kurtev, R.; Folkes, S.; Beamin, J. C.; Pena Ramirez, K.; Borissova, J.; Pinfield, D.J.; Jones, H.R.A.; Minniti, D.; Ivanov, V.D. (2013-10-15)
      Here we present survey of proper motion stars towards the Galactic Bulge and an adjacent plane region base on VISTA-VVV data. The searching method based on cross-matching photometric Ks-band CASU catalogs. The most interesting ...

    • The VVV Infrared Variability Catalog (VIVA-I) 

      Lopes, C. E. Ferreira; Cross, N. J. G.; Catelan, M.; Minniti, D.; Hempel, M.; Lucas, P. W.; Angeloni, R.; Jablonsky, F.; Braga, V. F.; Leao, I. C.; Herpich, F. R.; Alonso-Garcia, J.; Papageorgiou, A.; Pichara, K.; Saito, R. K.; Bradley, A.; Beamin, J. C.; Cortes, C.; Medeiros, J. R. De; Russell, Christopher M. P. (2020-08)
      Thanks to the VISTA Variables in the Via Lactea (VVV) ESO Public Survey it is now possible to explore a large number of objects in those regions. This paper addresses the variability analysis of all VVV point sources having ...

    • VVV J165507.19-421755.5: A Nearby T Dwarf Hidden in the Galactic Plane 

      The Backyard Worlds: Planet 9 Collaboration; The Backyard Worlds: Cool Neighbors Collaboration (2022-09-14)
      We present the discovery of VVV J165507.19−421755.5, a mid-T dwarf found through ongoing unWISE-based proper motion searches. A near-infrared spectrum of this object obtained with the NIRES instrument on the Keck II telescope ...

    • The VVV Open Cluster Project II. Near-infrared sequences of 37 open clusters on eight-dimensional parameter space 

      Ramírez, K. Peña; Smith, L. C.; Alegría, S. Ramírez; Chené, A. -N.; González-Fernández, C.; Lucas, P. W.; Minniti, D. (2022-07-01)
      Open clusters are key coeval structures that help us understand star formation, stellar evolution and trace the physical properties of our Galaxy. In the past years, the isolation of open clusters from the field has been ...

    • VVV Survey Microlensing : Catalog of Best and Forsaken Events 

      Navarro, Maria Gabriela; Ramos, Rodrigo Contreras; Minniti, Dante; Pullen, Joyce; Capuzzo-Dolcetta, Roberto; Lucas, Philip W. (2020-04-10)
      We search for microlensing events in the zero-latitude area of the Galactic Bulge using the VVV Survey near-IR data. We have discovered a total sample of N = 630 events within an area covering 20.68 deg 2 between the years ...

    • VVV-WIT-01: highly obscured classical nova or protostellar collision? 

      Lucas, P. W.; Minniti, D.; Kamble, A.; Kaplan, D. L.; Cross, N.; Dekany, I.; Ivanov, V. D.; Kurtev, R.; Saito, R. K.; Smith, L. C.; Catelan, M.; Masetti, N.; Toledo, I.; Hempel, M.; Thompson, M. A.; Peña, C. Contreras; Forbrich, J.; Krause, M.; Dale, J.; Borissova, J.; Emerson, J.P. (2020-03)
      A search of the first Data Release of the VISTA Variables in the Via Lactea (VVV) Survey discovered the exceptionally red transient VVV-WIT-01 (H-Ks=5.2). It peaked before March 2010, then faded by ~9.5 mag over the following ...