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Browsing Metrology by Title

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  • Shaik, A; Tlale, NS; Bright, G (Massey University, 2008-12)
    A low cost sensor system is envisaged that has 2 distinct routes for resolution enhancement in position detection. The main area for application of the sensor design would be in the food processing and packaging industry ...
  • Van Wyngaardt, WM; Simpson, BRS (Elsevier Science Ltd, 2006-10)
    Four radionuclides with electron-capture-based decay schemes have been directly measured by a liquid scintillation coincidence extrapolation technique. The advantage of using (LS) counting in the 4p channel is that ...
  • Simpson, BRS; Van Wyngaardt, WM (Pergamon-Elsevier Science Ltd, 2006-10)
    The absolute activities of the pure beta-emitters Sr-89 and Y-90 have been determined by a direct method, namely the triple-to-double coincidence ratio (TDCR) efficiency calculation technique. This undertaking has extended ...
  • Brown, N; Ecom, TB; Howick, E; Kruger, O; Lan, Y; Ling-Tang, SL; Matsumoto, H; Pusaka, J; Singhal, RP; Xu, Y (Bureau Int Poids Mesures, 1996)
    A comparison of gauge blocks has been carried out in the Asia/Pacific Region as part of an international comparison decided on by the Comite Consultatif pour la Definition du Metre. Ten national standards laboratories ...
  • Marais, EL (National Laboratory Association, 2006)
    At the end of 2005 it was decided that a number of measurements performed in the dc Low Frequency (dclf) Laboratory of the CSIR National Metrology Laboratory (CSIR NML) could benefit from automation. The measurements ...
  • Cassette, P; Ahn, GH; Alzitzoglou, T; Aubineau-Laniece, I; Bochud, F; Torano, EG; Carles, AG; Malonda, AG; Kossert, K; Lee, KB; Laedermann, JP; Simpson, BRS; Van Wyngaardt, WM; Zimmerman, BE (Pergamon-Elsevier Science Ltd, 2006-10)
    The CIEMAT/NIST and TDCR methods in liquid scintillation counting, initially developed for the activity standardization of pure beta radionuclides, have been extended to the standardization of electron capture and beta–gamma ...
  • Van Tonder, N; Denner, BF; Chang, MS (Elsevier Science BV, 1999-02-02)
    A chromaticity comparison took place in order to fulfil the requirements of the mutual recognition agreement (MRA) between the South African National Metrology Laboratory (CSIR/NML) and the Taiwanese National Measurement ...
  • Sharma, Ameeth; Singh, Ann; Roberts, Ted; Ramokolo, Rocky; Van der Westhuizen, Corrie (CSIR, 2016-11)
    The optical coherence technique (OCT) technique, which was demonstrated by Fercher and Huang in the early 90s, has made significant strides in bio-medical diagnostic applications in the fields of dermatology, dentistry and ...
  • Prins, SN; Cornish, LA; Boucher, PS (Elsevier Science SA, 2005-11-10)
    The liquidus surface projection for the Al-Pt-Ru ternary system has been determined based on the micro-structural characterisation of arc-melted alloys. The liquidus surface is dominated by the similarity to RuAl phase, ...
  • Bassa, H; Konrad, T; Diósi, L; Uys, Hermann (Elsevier, 2017-08)
    We study the convergence properties of state estimates of an oscillating qubit being monitored by a sequence of discrete, unsharp measurements. Our method derives a differential equation determining the evolution of the ...
  • Shikwambana, L; Sivakumar, V (SASAS 2013, 2013-09)
    This study shows the estimates of aerosol optical depth measured over Pretoria, South Africa, using the CSIR-NLC mobile LIDAR. The measurements are also compared with observations from the Level-3 MODIS aerosol optical ...
  • Pieterse, N; Focke, WW; Vuorinen, E; Racz, I (Pergamon-Elsevier Science Ltd, 2006-08)
    Volatile corrosion inhibitors (VCIs) are incorporated into packaging paper or film to protect metals against atmospheric corrosion. The vapour pressure determines the equilibrium concentration of a volatile corrosion ...
  • Pretorius, R; Theron, CC; Marais, TK; Ras, HA (Elsevier Science SA Lausanne, 1993-11)
    The effective heat of formation model allows heats of formation to be calculated as a function of the concentration of the reactants at the growth interface. The effective concentration is taken to be the concentration of ...
  • Razdolescu, AC; Broda, R; Cassette, P; Simpson, BRS; Van Wyngaardt, WM (Pergamon-Elsevier Science Ltd, 2006-10)
    The paper summarizes the IFIN-HH triple coincidence liquid scintillation counter used for the implementation of the TDCR method. The electronic unit was recently extended to record the three individual double coincidence ...
  • Moodley, SS; Van der Berg, W; Veldman, CS (Institute of Electrical Electronics Engineers Inc, 2003-04)
    The CSIR - NML (Council for Scientific and Industrial Research, National Metrology Laboratory) of South Africa, manufactured a 10-pF ultra-low expansion quartz capacitors in the early 1970s. Although the capacitors were ...
  • De Vreede, JPM; Korfage, W; Persson, P; Brunetti, L; Lopez, V; Petras, I; Morard, P; Hejsek, F; Torok, A; Ruhaak, J; Ascroft, J; Dressler, E; Celep, M; Lapuh, R; Achkar, J (Institute of Electrical and Electronics Engineers Inc., 2001-04)
    A Euromet international laboratory comparison (Project 393) has been carried out between 14 national standards laboratories. Thermistor mounts were used, equipped with PC7 as well as Type N connectors. The comparison is ...
  • Oldham, N; Nelson, T; Bergeest, R; Ramm, G; Carranza, R; Corney, AC; Gibbes, M; Kyriazis, G; Laiz, HM; Liu, LX; Lu, Z; Pogliano, U; Rydler, KE; Shapiro, E; So, E; Temba, M; Wright, P (IEEE-Institute of Electrical Electronics Engineers Inc, 2001-04)
    An international comparison of 50/60 Hz power is described. The travelling standard was an electronic power transducer that was tested at 120 V, 5 A, 53 Hz, at five power factors (1.0, 0.5, and 0.0). Fifteen National ...
  • Robinson, SP; Harris, PM; Ablitt, J; Hayman, G; Thompson, A; Van Buren, AL; Zalesak, JF; Drake, RM; Isaev, AE; Enyakov, AM; Purcell, C; Zhu, HQ; Wang, YB; Zhang, Y; Botha, P; Kruger, D (Acoustical Society of America: American Institute of Physics, 2006-09)
    A description is given of the results of a Key Comparison of primary free-field standards for underwater acoustics at frequencies from 1 to 500 kHz. This is the first such Key Comparison exercise in the field of underwater ...
  • Becerra, LO; Berry, J; Chang, CS; Chapman, GD; Chung, JW; Davis, RS; Field, I; Fuchs, P; Jacobsson, U; Lee, SM; Loayza, VM; Madec, T; Matilla, C; Ooiwa, A; Scholz, F; Sutton, C; van Andel, I (IOP Publishing Ltd, 2006-09)
    The ubiquitous technology of magnetic force compensation of gravitational forces acting on artifacts on the pans of modern balances and comparators has brought with it the problem of magnetic leakage from the compensation ...
  • White, N; teWaterNaude, J; Van der Walt, A; Ravenscroft, G; Roberts, W; Ehrlich, R (BioMed Central, 2009-09)
    Community concern about asthma prompted an epidemiological study of children living near a petrochemical refinery in Cape Town, South Africa. Because of resource constraints and the complexity of refinery emissions, neither ...

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