1,728,648 research outputs found

    Sherwin H. Kalt, 86

    No full text
    Sherwin Harvey Kalt, a Palo Alto resident who was a rocket scientist and pioneer in the computer industry, has died. He was 86

    Auflösen von Grenzen der Disziplinen?

    Get PDF
    Podiumsdiskussion am Collegium Generale zur Thematik: Am Limit? Grenzen in den Wissenschaften heute. Teilnehmer: Prof. Dr. Gern Folkers, Direktor, Collegium Helveticum Prof. Dr. Angela Kalt, stv. Direktorin, Schweizerischer Nationalfonds Prof. Dr. Pasqualina Perrig-Chiello, Präsidentin, Network of Transdisciplinary Researc

    Calibrations for planar laser nephelometry in densely seeded two-phase flows

    No full text
    Nephelometry is a laser based imaging technique, which uses the signal of light scattered off particles to provide information about the local number density of these particles. In densely seeded flows of practical interest, such as pulverised coal flames, particle loadings can become very high, to the point where the incident laser beam is severely attenuated. Therefore, measurements in flows are hampered by these practical difficulties, and there are limited data at these conditions. Laser attenuation experiments were conducted in suspensions of spherical particles in water at various concentrations. Results enabled the formulation of a calibration for the effects of diffuse scatter and laser sheet extinction. A model for the distribution of light through a densely seeded, light-scattering medium is developed and is compared to experimental results. It is demonstrated that the scattered signal may be considered proportional to the local particle concentration multiplied by the incident laser power. The incident laser power varies as a function of the attenuation by obscurement. The current laser sheet extinction model may be implemented for both collimated and diverging light, in addition to nonhomogenously seeded scattering media. This correction for planar nephelometry images thus extends the technique to provide pseudo-quantitative data for instantaneous particle concentration measurements.Peter A. M. Kalt and Cristian H. Birze

    Effect of Reynolds number on the spatial distribution of OH and formaldehyde in jet flames in a heated and diluted co-flow

    No full text
    The spatial distribution of OH, formaldehyde (H2CO) and temperature imaged by laser diagnostic techniques are presented. The measurements are of nonpremixed jet flames in a hot and highly diluted co-flow. These conditions emulate those of Moderate and Intense Low Oxygen Dilution (MILD) combustion. This paper presents some results on the effect of O2 co-flow level and jet Reynolds number on the structure of the flames for various fuels (each diluted by hydrogen 1:1 vol/vol). A reduction of O2 levels is shown to lead to a substantial suppression of OH and a drop in peak temperatures. For strained flames, increased dilution of O2 also leads to reduction of H2CO. Reynolds number effects on the radial profiles of the flame species considered are shown to be minor compared to O2 levels. The drop of the peak temperature in a low O2 co-flow leads to a reduction of thermal gradients and hence a laminarisation of these flames. Strain rate does have a significant effect on the relative levels of H2CO however, with levels increasing markedly with higher Reynolds number.P R Medwell, P A M Kalt, and B B Dallyhttp://www.mecheng.adelaide.edu.au/aspacc05/noframes.htm

    Ein kurtzes und kurtzweiliges Ein lustiges und listiges Gesang von Zürcher und Berner Krieg Chronologicum Oder Zahl-Buchstaben Declinaverunt in te Mala Psalm. 20. Verf. 12. Zürcher und Berner haben auff dich gewendt das Böß

    No full text
    Liedanfang, Bl.1, v Kein Faden wird niemahl so klein und rein gesponnen, So komt er doch (wie man thut sagen) an d’Sonnen [Peter Kalt][Peter Kalt]LiedflugschriftVerfasser ermittel

    Wahre Abconterfethung dess weitberümbten Bodensee, sambt derselben Gelegenheit

    No full text
    [von Johann Georg Tibianus] ; David SeltzelNordostorientiertMassstabsleiste: (Meilen?) [3 = 221 mm

    E. Kalt, Biblische Archäologie, 1934

    No full text
    Dennefeld Louis. E. Kalt, Biblische Archäologie, 1934. In: Revue des Sciences Religieuses, tome 15, fascicule 1, 1935. p. 126
    corecore