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Browsing Metrology by Issue Date

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  • Ryan, PG; Steele, WK; Siegfried, WR; Vogel, JC (Bureau Scientific Publications, 1992-11)
    There are several problems associated with determining radiocarbon dates, particularly for organic material from Antarctica. However, this study attempts to find accurate measure of the length of time these radiocarbon ...
  • 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 ...
  • 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 ...
  • Oschadleus, HD; Vogel, JC; Scott, L (Bureau Scientific Publications, 1996-01)
    The age of the peat, or 'lignite', layer in the Port Durnford Formation on the Zululand coast has been established to be about 70 kyr by means of the Th-230/U-234 disequilibrium dating technique. This date places the pent ...
  • Larom, D; Garstang, M; Lindeque, M; Raspet, R; Zunckel, M; Hong, Y; Brassel, K; OBeirne, S; Sokolic, F (American Institude of Physics, 1997-03)
    Measured vertical profiles of temperature and wind an used to model infrasound propagation over a representative high savanna habitat typically occupied by the African elephant, Loxodonta Africana, to predict calling ...
  • 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 ...
  • Kruger, OA (Bureau International des Poids et Mesures, 2000)
    In angle calibrations the uncertainty contributions of the autocollimator and index table are easily estimated as these uncertainties are well documented, but it is more difficult to determine the uncertainties associated ...
  • 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 ...
  • Simpson, BRS (Pergamon-Elsevier Science Ltd, 2002-01)
    South Africa's national radioactivity measurement standard is maintained at a satellite laboratory in Cape Town by the National Metrology Laboratory (NML) of the Council-for Scientific and Industrial Research. Standardizations ...
  • Prins, SN; Cornish, LA; Stumpf, WE; Sundman, B (Pergamon-Elsevier Science Ltd, 2003-03)
    The CALPHAD technique was used to calculate the Al-Ru binary phase diagram. The RuAl (B2) phase was described with the sublattice model (SL), also designated Compound Energy Formalism (CEF), as well as the Modified Sublattice ...
  • 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 ...
  • Andreev, GN; Barzev, A (Elsevier Science BV, 2003-12-16)
    The ability of Raman spectroscopy to investigate chemical substances in water media was applied for studying the surface products of the chalcopyrite-sodium isopropyl xanthate flotation system. Performing the reaction in ...
  • Simpson, BRS; Morris, WM (Pergamon-Elsevier Science Ltd, 2004-02)
    The activity of the pure beta-emitter phosphorus-33 (P-33) has been directly determined by the triple-to-double coincidence ratio (TDCR) efficiency calculation technique, thus extending the number of radionuclides that ...
  • 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, ...
  • 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 ...
  • 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 ...
  • Van Wyngaardt, WM; Simpson, BRS (Elsevier Science BV, 2006-08-01)
    A simple counting technique to measure mixtures of two pure beta-emitting radionuclides is described. The method is based on elements of two liquid scintillation techniques that are widely used to measure single-radionuclide ...
  • 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 ...

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