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Enlighten (160.982 recursos)

Enlighten is the University of Glasgow's institutional repository service for published research material including peer-reviewed journal articles, published conference papers,books and book chapters

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Mostrando recursos 21 - 40 de 52.022

  1. Graevenitz, Gerhart von. Theodor Fontane: Ängstliche Moderne. Über das Imaginäre. Konstanz: Konstanz University Press, 2014

    Schonfield, Ernest
    No abstract available.

  2. David Horton. Thomas Mann in English. A Study in Literary Translation. New Directions in German Studies, 8. London: Bloomsbury, 2013. Børge Kristiansen. Thomas Mann - Der ironische Metaphysiker. Nihilismus - Ironie - Anthropologie in Thomas Manns Erzählungen und im ‘Zauberberg’. Würzburg: Königshausen & Neumann, 2013.

    Schonfield, Ernest
    No abstract available.

  3. Flow structure generated by laser-induced blast wave propagation through the boundary layer of a flat plate

    Ukai, Takahiro; Kontis, Konstantinos; Yang, Leichao
    Laser energy deposition generates localized flow structures that can be used as flow control devices in high-speed flows. In the present study, the interaction between a laser-induced blast wave and an incoming laminar boundary layer on a flat plate was experimentally investigated at a Mach 5 flow with three different unit Reynolds numbers. A hemispherical laser-induced blast wave (LIBW) is induced by focusing a 532 nm pulsed Nd:YAG laser beam on the surface of the plate. The hemispherical shaped fore wave front of the LIBW is locally transformed to an oblique shape, which results in a laser-induced oblique shock wave...

  4. Background-oriented schlieren (BOS) for scramjet inlet-isolator investigation

    Idris, Azam Che; Saad, Mohd Rashdan; Lo, Kin Hing; Kontis, Konstantinos
    Background-oriented Schlieren (BOS) technique is a recently invented non-intrusive flow diagnostic method which has yet to be fully explored in its capabilities. In this paper, BOS technique has been applied for investigating the general flow field characteristics inside a generic scramjet inlet-isolator with Mach 5 flow. The difficulty in finding the delicate balance between measurement sensitivity and measurement area image focusing has been demonstrated. The differences between direct cross-correlation (DCC) and Fast Fourier Transform (FFT) raw data processing algorithm have also been demonstrated. As an exploratory study of BOS capability, this paper found that BOS is simple yet robust enough...

  5. Working class

    Schonfield, Ernest
    No abstract available.

  6. Revolution

    Schonfield, Ernest
    No abstract available.

  7. Picaresque

    Schonfield, Ernest
    No abstract available.

  8. Newspapers

    Schonfield, Ernest
    No abstract available.

  9. Colonialism

    Schonfield, Ernest
    No abstract available.

  10. Illness

    Schonfield, Ernest
    No abstract available.

  11. Bureaucracy

    Schonfield, Ernest
    No abstract available.

  12. Charisma

    Schonfield, Ernest
    No abstract available.

  13. Non-collinear Wave Mixing for a Bulk Wave Phase Velocity Measurement in an Isotropic Solid

    Demcenko, A.
    A measurement method is presented to estimate the bulk wave phase velocity in an isotropic solid when longitudinal or shear wave velocity is known. This method is based on the non-collinear plane wave interaction theory and it does not need to estimate the phase time-of-flight and wave propagation path of ultrasonic wave in a specimen. It is necessary to measure incident angles of pump waves for estimation of the longitudinal or shear wave phase velocity. Using the proposed method, the shear wave phase velocity is measured in an aluminum specimen to be 3189 m/s ± 202 m/s and 3174 m/s...

  14. Non-collinear wave mixing for non-linear ultrasonic detection of physical ageing in PVC

    Demcenko, A.; Akkerman, R.; Nagy, P.B.; Loendersloot, R.
    This work considers the characterization of linear PVC acoustic properties using a linear ultrasonic measurement technique and the non-collinear ultrasonic wave mixing technique for measurement of the physical ageing state in PVC. The immersion pulse-echo measurements were used to evaluate phase velocity dispersion and attenuation of longitudinal waves in PVC test specimens. The suggested non-collinear ultrasonic wave mixing technique measurement technique was verified on measurements of laboratory and field PVC test specimens. The measurement results confirm that the ultrasonic wave mixing technique is suitable to estimate the physical ageing state of PVC.

  15. Isothermal epoxy-cure monitoring using nonlinear ultrasonics

    Koissin, V.; Demcenko, A.; Korneev, V.A.
    Isothermal curing of LY 1564SP resin in an aluminium-adhesive-aluminium laminate is investigated, using a nonlinear ultrasonic immersion technique, to prove its applicability for this type of dynamic material transformation. For verification and comparison, epoxy-cure kinetics and rheological behavior are measured using differential scanning calorimetery (DSC) and dynamic mechanical analysis (DMA). Results reveal that the nonlinear ultrasonics, based on noncollinear wave mixing, can successfully be applied to in situ epoxy-cure monitoring—for example, to adhesive bonds—with reliable detection of gelation and vitrification time instants.

  16. Noncollinear wave mixing for measurement of dynamic processes in polymers: Physical ageing in thermoplastics and epoxy cure

    Demcenko, A.; Koissin, V.; Korneev, V.A.
    Elastic wave mixing using an immersion method has shown effective monitoring and scanning capabilities when applied to thermoplastic ageing, epoxy curing, and non-destructive testing. In water, excitation and reception of waves do not require physical contact between the tools and the specimen, making the acquisition of high-resolution C-scans possible. The nonlinear material parameters exhibit a much higher sensitivity to the specimen state compared to linear ones. Thus, the nonlinear data for polymethyl methacrylate (PMMA) have a 40% difference between zones of “young” and “aged” material, while the linear data show no difference at all. Methodology and logistics of the immersion...

  17. Possible second-order nonlinear interactions of plane waves in an elastic solid

    Korneev, V.A.; Demcenko, A.
    There exist ten possible nonlinear elastic wave interactions for an isotropic solid described by three constants of the third order. All other possible interactions out of 54 combinations (triplets) of interacting and resulting waves are prohibited, because of restrictions of various kinds. The considered waves include longitudinal and two shear waves polarized in the interacting plane and orthogonal to it. The amplitudes of scattered waves have simple analytical forms, which can be used for experimental setup and design. The analytic results are verified by comparison with numerical solutions of initial equations. Amplitude coefficients for all ten interactions are computed as...

  18. A study of the noncollinear ultrasonic-wave-mixing technique under imperfect resonance conditions

    Demcenko, A.; Mainini, L.; Korneev, V.A.
    Geometrical and material property changes cause deviations in the resonant conditions used for noncollinear wave mixing. These deviations are predicted and observed using the SV(ω1) + L(ω2) → L(ω1 + ω2) interaction, where SV and L are the shear vertical and longitudinal waves, respectively, and ω1, ω2 are their frequencies. Numerical predictions, performed for the scattered secondary field in the far field zone, show three field features of imperfect resonance conditions: (1) rotation of a scattered beam, (2) decrease in the beam amplitude, and (3) beam splitting. The response of the nonlinear ultrasonic wave mixing technique is verified experimentally in two...

  19. An empirical approach to service classification for productivity management studies

    Shafti, Farhad; Van Der Meer, Robert; Williams, Terry
    This paper presents key results of a research project on the application of service dimensions and classifications, to study differences between productivity management challenges across 12 important service sectors in the UK. The research methodology was mainly empirical in nature: unlike other research in this area, appropriate service dimensions and consequent classification models were introduced only after analysing the relationship between a number of candidate dimensions and aspects of productivity management. Among the dimensions studied, Front/Back Value Added, Personnel Judgement and Product/Process Focus turned out to be suitable indicators for a range of aspects relating to productivity management in services.

  20. An extraordinary invitation: the Education (Scotland) Act of 1918

    McKinney, Stephen J.
    No abstract available.

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