Now showing items 1-20 of 1069

    • A 220 GHz 3D imaging radar with sub-cm3 voxel resolution for security applications 

      Robertson, Duncan Alexander; MacFarlane, David Graham; Bryllert, Tomas (IEEE, 2017-01-19) - Conference item
      Radars operating at high millimetre and sub-millimetre wave frequencies are promising candidates for security applications such as people screening since they offer the possibility to form 3D images through clothing with ...
    • 220GHz wideband 3D imaging radar for concealed object detection technology development and phenomenology studies 

      Robertson, Duncan Alexander; Macfarlane, David Graham; Bryllert, Tomas (SPIE, 2016-05-12) - Conference item
      We present a 220 GHz 3D imaging ‘Pathfinder’ radar developed within the EU FP7 project CONSORTIS (Concealed Object Stand-Off Real-Time Imaging for Security) which has been built to address two objectives: (i) to de-risk ...
    • 3-2: Invited paper: Color on Demand - Color-tunable OLEDs for lighting and displays 

      Fröbel, Markus; Schwab, Tobias; Kliem, Mona; Lenk, Simone; Leo, Karl; Reineke, Sebastian; Gather, Malte C. (2017) - Journal article
      A device concept for highly efficient OLEDs is introduced that allows to tune the emission color of the device over a broad range of the CIE color gamut. The approach exploits the different polarities of the positive and ...
    • 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation 

      Sokolovskii, Grigorii S.; Melissinaki, Vasileia; Fedorova, Ksenia A.; Dudelev, Vladislavv; Losev, Sergey N.; Bougrov, Vladislav E.; Sibbett, Wilson; Farsari, Maria; Rafailov, Edik U. (2018-10-02) - Journal article
      Multimode high-power laser diodes suffer from inefficient beam focusing, leading to a focal spot 10-100 times greater than the diffraction limit. This inevitably restricts their wider use in 'direct-diode' applications in ...
    • 3D Monte Carlo radiation transfer modelling of photodynamic therapy 

      Campbell, Catherine Louise; Christison, C.; Brown, C Tom A; Wood, Kenny; Valentine, Ronan Martin; Moseley, H. (SPIE, 2015-06) - Conference item
      The effects of ageing and skin type on Photodynamic Therapy (PDT) for different treatment methods have been theoretically investigated. A multilayered Monte Carlo Radiation Transfer model is presented where both daylight ...
    • 3D PiC code investigations of Auroral Kilometric Radiation mechanisms 

      Gillespie, K. M.; McConville, S. L.; Speirs, D. C.; Ronald, K.; Phelps, A. D. R.; Bingham, R.; Cross, A. W.; Robertson, C. W.; Whyte, C. G.; He, W.; Vorgul, I.; Cairns, R. A.; Kellett, B. J. (IOP Publishing Ltd., 2014) - Conference item
      Efficient (similar to 1%) electron cyclotron radio emissions are known to originate in the X mode from regions of locally depleted plasma in the Earths polar magnetosphere. These emissions are commonly referred to as the ...
    • 94 GHz pulsed coherent radar for high power amplifier evaluation 

      Robertson, Duncan Alexander; Hunter, Robert Iain; Gallacher, Thomas (SPIE, 2016-05-12) - Conference item
      We present the design and characterization of a 94 GHz pulsed coherent radar to be used for the evaluation and demonstration of novel wideband, high power vacuum tube amplifier technology. The radar is designed to be fully ...
    • Absence of critical exponents in ferroelectrics : experiments of Hilczer and theory of Levanyuk and Sigov 

      Scott, J. F. (2016-08-02) - Journal article
      The pioneering breakthrough of Bozena Hilczer and her coworkers showed that the so-called critical phenomena in many ferroelectric crystals are entirely produced by defects. She studied gadolinium aluminum sulphate hexahydrate ...
    • Absence of giant spin splitting in the two-dimensional electron liquid at the surface of SrTiO3 (001) 

      McKeown Walker, S; Riccò, S; Bruno, F Y; de la Torre, A; Tamai, A; Golias, E; Varykhalov, A; Marchenko, D; Hoesch, M; Bahramy, M S; King, Philip David; Sánchez-Barriga, J; Baumberger, F (2016-06-22) - Journal article
      We reinvestigate the putative giant spin splitting at the surface of SrTiO3 reported by Santander-Syro et al. [Nature Mat. 13, 1085 (2014)]. Our spin- and angle-resolved photoemission experiments on fractured (001) oriented ...
    • AC losses in superconducting niobium 

      Al-Huseini, Fahad A. (University of St Andrews, 1973) - Thesis
      This thesis is concerned with measurements of alternating field losses in cylindrical rods of niobium in its superconducting state. Six samples have been investigated each with a different surface condition, Magnetization ...
    • Accretion disc time lag distributions : applying CREAM to simulated AGN light curves 

      Starkey, David; Horne, Keith; Villforth, C. (2016-02-21) - Journal article
      Active galactic nuclei (AGN) vary in their brightness across all wavelengths. Moreover, longer wavelength ultraviolet-optical continuum light curves appear to be delayed with respect to shorter wavelength light curves. A ...
    • Accurate astrophysical parameters for algol-type binary stars 

      Maxted, P. F. L. (University of St Andrews, 1995) - Thesis
      We present new, accurate astrophysical parameters for both components of the six short-period Algol-type binary stars RZ Cas, AT Peg, TX UMa, AF Gem, RU UMi and HU Tau. The accuracy of the astrophysical parameters is ensured ...
    • An acoustical investigation of the concert harp 

      Bell, Alexander J. (University of St Andrews, 1988) - Thesis
      This thesis is a report of acoustical research on the concert harp. The harp has an established place in the symphony orchestra and is reacquiring its role as a solo chamber instrument that it had before the development ...
    • Acousto-optical nanoscopy of buried photonic nanostructures 

      Czerniuk, T.; Schneider, C.; Kamp, M.; Höfling, Sven; Glavin, B. A.; Yakovlev, D. R.; Akimov, A. V.; Bayer, M. (2017-06-20) - Journal article
      We develop a nanoscopy method with in-depth resolution for layered photonic devices. Photonics often require tailored light field distributions for the operated optical modes and an exact knowledge of the geometry of a ...
    • Active slow light in silicon photonic crystals : tunable delay and Raman gain 

      Rey, Isabella H. (University of St Andrews, 2012-11-30) - Thesis
      In the past decade, great research effort was inspired by the need to realise active optical functionalities in silicon, in order to develop the full potential of silicon as a photonic platform. In this thesis we explore ...
    • Activity and magnetic field structure of the Sun-like planet-hosting star HD 1237 

      Alvarado-Gómez, J.D.; Hussain, Gaitee Ara Jaffer; Grunhut, J.; Fares, Rim; Donati, J.-F.; Alecian, E.; Kochukhov, O.; Oksala, M.; Morin, J.; Redfield, S.; Cohen, O.; Drake, J.J.; Jardine, Moira Mary; Matt, S.; Petit, P.; Walter, F.M. (2015-10) - Journal article
      We analyse the magnetic activity characteristics of the planet-hosting Sun-like star, HD 1237, using HARPS spectro-polarimetric time-series data. We find evidence of rotational modulation of the magnetic longitudinal field ...
    • Advanced light-sheet and structured illumination microscopy techniques for neuroscience and disease diagnosis 

      Nylk, Jonathan (University of St Andrews, 2016-11-30) - Thesis
      Optical microscopy is a cornerstone of biomedical research. Advances in optical techniques enable specific, high resolution, sterile, and biologically compatible imaging. In particular, beam shaping has been used to tailor ...
    • Advanced methods for enhanced sensing in biomedical Raman spectroscopy 

      Balagopal, Bavishna (University of St Andrews, 2014-06-25) - Thesis
      Raman spectroscopy is a powerful tool in the field of biomedicine for disease diagnosis owing to its potential to provide the molecular fingerprint of biological samples. However due to the inherent weak nature of the ...
    • Advanced multimodal methods in biomedicine : Raman spectroscopy and digital holographic microscopy 

      McReynolds, Naomi (University of St Andrews, 2017-12-07) - Thesis
      Moving towards label-free technologies is essential for many clinical and research applications. Raman spectroscopy is a powerful tool in the field of biomedicine for label-free cell characterisation and disease diagnosis, ...
    • Advanced optical techniques to study biomolecular aggregation processes 

      Quinn, Steven D. (University of St Andrews, 2014-06-25) - Thesis
      Alzheimer’s disease (AD) is characterised by a series of biomolecular aggregation events, which include the formation of neurotoxic protein structures composed of the β-amyloid (Aβ) peptide. In this thesis, fluorescence ...